quarter 2 module 1 electromagnetic waves · 2021. 1. 27. · trace the development of the...
TRANSCRIPT
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Republic of the Philippines
Department of Education Regional Office IX, Zamboanga Peninsula
Zest for Progress Zeal of Partnership
10
SCIENCE Grade10
Quarter 2 – Module 1
ELECTROMAGNETIC WAVES
Name of Learner: ___________________________
Grade & Section: ___________________________
Name of School: ___________________________
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2
What I Need to Know
When you were in Grade 7, you were able to demonstrate understanding of the
characteristics of light by explaining color and intensity of light in terms of its wave
characteristics. In Grade 8, you grasped the knowledge about some of properties and
characteristics of light by explaining the hierarchy of colors in relation to the energy of
visible light. This time, it will be all about comparing the relative wavelengths of different
forms of electromagnetic waves.
Have you ever tried sending messages, cooking in a microwave, listening radio or
watching TV today? Have you ever tried to ask yourself “What makes this possible?”. As
you go along this module, you will able to answer that BIG question.
Content Standard
The different regions of electromagnetic Spectrum
Most Essential Learning Competency (MELC)
Compare the relative wavelengths of different forms of electromagnetic wave
(S10FE 11a-b-470)
Specific Objectives:
a. Trace the development of the electromagnetic wave theory
b. Describe how electromagnetic wave is produced and propagated.
Module
1 Electromagnetic Waves
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3
What’s In
Let us recall the dispersion of light that you learned in Grade 8. This is when white light
splits into many colors as it passes through a prism, thus creating a rainbow.
Trivia: A rainbow is caused by sunlight and atmospheric conditions. Light enters a water
droplet, slowing down and bending as it goes from air to denser water. The light reflects
off the inside of the droplet, separating into its component wavelengths--or colors. When
light exits the droplet, it makes a rainbow.
(Source: https://scijinks.gov/rainbow/#:~:text=A%20rainbow%20is%20caused%20by,droplet%2C%20it%20makes%20a%20rainbow.)
ACTIVITY 1: SHINE LIKE RAINBOW!
Directions: In the left box below, write the 7 colors of the rainbow arranged from
top to bottom in the space provided (0.5 point each). In the right box below, write T if the
statement about energy, frequency and wavelength is true and F if the statement is false
(1 point each).
1. RED
2. ____________
3. YELLOW
4. ____________
5. ____________
6. INDIGO
7. ____________
___1. Red light has the highest frequency.
___2. Violet has the highest energy.
___3. Violet has the longest wavelength.
___4. The higher the frequency of light, the greater the energy.
___5. The longer the wavelength, the lesser the frequency of
light.
___6. Wavelength is directly proportional to frequency.
___7. Frequency is inversely proportional to energy.
___8. Wavelength is inversely proportional to energy.
Score: ____ 12
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4
What’s New
ACTIVITY 2A: MATCH ME!
Directions: Match the scientists given below with their contributions. Write the
letter of the correct answer in the space provided before each number.
Scientists Contributions
______1.Ampere a. Contributed in developing equations that showed
the relationship of electricity and magnetism
_____2. Faraday b. Showed experimental evidence of electromagnetic
waves and their link to light
_____3. Hertz c. Demonstrated the magnetic effect based on the
direction of current
_____4. Maxwell d. Formulated the principle behind electromagnetic
induction
_____5. Oersted e. Showed how a current-carrying wire behaves like a
magnet
ACTIVITY 2B. LET’S TALK ABOUT EM!
Directions: Write T if the statement is True, F if the statement is false. (1 point each)
_______1. Electromagnetic waves transfer energy through vacuum.
______ 2. A wave is a disturbance that transfers energy
______ 3. Most EM waves are invisible and undetectable.
______ 4. The electric field and the magnetic field oscillate parallel to each other
______ 5. As wavelength increases, the frequency of wave also increases.
Score: ____ 5
Score: ____ 5
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5
What Is It
In the previous activity, you matched the scientists with their contributions
on the discoveries of electricity and magnetism and the development of
Electromagnetic wave theory. Hoping that you got them right. Take a look at this.
.
James Clerk Maxwell
1831-1879
Andre-Marie Ampere
1775-1836
Hans Christian Oersted
1777--1851
Showed how a current
carrying wire behaves like
a magnet.
Formulated the principle
behind electromagnetic
induction.
Contributed in developing
equations that showed the
relationship of electricity and
magnetism.
Showed experimental
evidence of electromagnetic
waves and their link to light.
Demonstrated the
magnetic effect based on
the direction of current.
Michael Faraday
1791-1867
Source:en.wikipedia.org/wiki/Michael_Faraday
Heinrich Hertz
1857--1894
Source:https://en.wikipedia.org/wiki/Heinrich_Hertz
Source:https://www.britannica.com/biograph
y/AndreMarie-Ampere/media/1/21416/8352
Source:thoughtco.com/james-clerk-
maxwell-inventor1991689
Source:aps.org/publications/apsne
w/200807/physicshistory.cfm
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6
Electromagnetic Waves
Accelerating electrons produce electromagnetic (EM) waves. These waves are
a combination of electric and magnetic fields. A changing magnetic field produces an
electric field and a changing electric field produces a magnetic field. As accelerated
electrons produce an electric field of a wave, the varying electric field produces the wave’s
magnetic field. Both the electric field and the magnetic field oscillate perpendicular to each
other and to the direction of the propagating wave. Therefore, electromagnetic waves are
transverse waves, as shown in Figure 1.
Figure 1. Electromagnetic Wave Propagation
Among the examples of EM waves are radiowaves, microwaves, infrared, visible
light, ultraviolet, x-rays and gamma rays. All EM waves travel at a speed of 3 X 108 m/s
in a vacuum and denoted as c, the speed of light.
Since all the electromagnetic waves have the same speed, as wavelength
decreases, the frequency of the wave increases as expressed in the equation
v=λf
where: v is the wave speed, or c (speed of light) expressed in meter per second,
f is the frequency expressed in Hertz
λ is the wavelength expressed in meters
Speed
All electromagnetic waves travel at a speed of 300,000 km/s (3 x 108m/s) in a
vacuum of space. However, when electromagnetic waves travel through matter, they slow
down. The speed of the wave depends upon the material they travel through.
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Electromagnetic waves usually travel the slowest in solids and the fastest in gases, as
shown in Table 1 below.
Material Speed (Km/s)
Vacuum 300,000
Air Slightly less than 300,000
Water 226,000
Glass 200,000
Diamond 124,000
Table 1. Speed of Visible Light
Frequency
The frequency, represented by the Greek letter nu (ν), is the number of waves
that pass a certain point in a specified amount of time. Typically, frequency is measured
in units of cycles per second or waves per second. One wave per second is also called a
Hertz (Hz) and in SI units is a reciprocal second (s−1).
Example Problem 1: (Assume that the waves propagate in a vacuum.)
1. What is the frequency of radio waves with wavelength of 20 m?
Given: v= c = 3 X 108 m/s
λ= 20 m
f= ?
Equation:
v=c=λf
Solution:
f=c/λ = 3 X108 m/s
20 m
= 1.5 X 107 Hz
Wavelength
Wavelength is defined as the distance measured from one crest of a wave to the
next crest or from one through to the second through.
A wave cycle
consists of one complete
wave—starting at the zero
point, going up to a wave
crest, going back down to a
wave trough, and back to
the zero point again. The
wavelength of a wave is the Figure 2. The wavelength
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8
distance between any two corresponding points on adjacent waves. It is easiest to
visualize the wavelength of a wave as the distance from one wave crest to the next. In an
equation, wavelength is represented by the Greek letter lambda (λ). Depending on the
type of wave, wavelength can be measured in meters, centimeters, or nanometers (1 m
= 109 nm). To find wavelength ( λ ), use this equation v=λf
Example Problem 2:
1. What is the wavelength of an electromagnetic wave that has a frequency of 4.95×1014 Hz?
Given : f = 4.95 x 1014 Hz v= c=3.00 x 108 m/s λ =? Equation: v=λf
What’s More
ACTIVITY 3: SOLVE ME!
Directions: Solve the problem. Write all your solutions and answers on the space provided after the question.
1. Calculate the wavelength of a photon that has a frequency of 2.5 x 1012Hz. (5
points) .
2. What is the frequency of an electromagnetic wave having a wavelength of 300,000 km? (5 points)
Score: ____ 10
Solution: λ=v/f = 3.00 x 108 m/s /
4.95 x 1014Hz = 6.06×10-7m
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What I Have Learned
ACTIVITY 4: FILL ME!
Direction: Complete the statements below by filling in with correct word(s) found in the
box. (1 point each)
magnetic field Maxwell perpendicular
electric field Faraday transverse
electromagnetic wave theory vacuum
electromagnetic waves 3x108m/s
1. A changing magnetic field produces an ___________.
2. A changing electric field produces a ______________
3. The successive production of electric and magnetic field results to the creation of
_______________________wave.
4-5. The electric and magnetic fields vibrate _______________to each other to the
direction the wave travels so it is a _________________________ wave.
6. James Clerk Maxwell formulated the ___________________- which says that an
oscillating electric current should be capable of radiating energy in the form of
electromagnetic waves.
7. The one who formulated the principle behind electromagnetic induction was
_____________.
8. ___________________ contributed in developing equations showing the relationship
of electricity and magnetism.
9-10. EM waves can travel through a ____________ with a speed value of
__________________.
Score: ____ 10
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10
What I Can Do
ACTIVITY 5: COMPLETE ME!
Directions: Complete the concept map (1 point each)
Can travel through
Have
properties
of
Defined as
SI unit
Electromagnetic
radiation
Distance
between wave
crests
Score: ____ 10
X-rays
Defined as
Spectrum
which includes
Transfers kinetic
energy in form of
Range is called
the
Defined as
SI unit
Hertz
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Assessment
MULTIPLE CHOICE
Directions: Identify the letter of the choice that best completes the statement or answers
the question. Write the letter on the space provided before each number.
____1 Who formulated the principle behind electromagnetic induction?
a. Faraday
b. Hertz
c. Ampere
d. Maxwell
____2. In the electromagnetic wave, the direction of the propagation of the wave
is_____.
a. always to the right
b. always to the left
c. parallel to electric and magnetic field directions
d. perpendicular to the electric and magnetic field directions
____3. Which of the following is the contribution of Oersted in the development of
Electromagnetic Wave Theory?
a. demonstrated the magnetic effect based on the direction of current
b. showed how a current carrying wire behaves like a magnet
c. showed how experimental evidence of electromagnetic waves and their
link to light
d. contributed in developing equations that showed the relationship of
electricity and magnetism.
____4. The following are the properties of Electromagnetic waves EXCEPT_______.
a. EM waves can travel through a vacuum
b. EM waves travel at the speed of 3 x 108 m/s
c. EM waves have an electric field and magnetic field which vibrate
parallel to each other
d. As wavelength of EM wave decreases, its frequency increases.
Score: ____ 10
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____5. The source of all electromagnetic wave is
a. magnetic fields
b. heat
c. electric fields
d. vibrating charges
____6. Which of the following is NOT an electromagnetic wave?
a. Sound
b. Radio
c. Light
d. Infrared
____7. How far is a light-second?.
a. 5000 km
b. 300,000 km
c. 4,000,000 km
d. 50,000,000 km
____8. What is the wavelength of an electromagnetic wave that has a frequency of 1
Hz?
a.More than 1 m
b.Less than 1 m
c.1 m
d Cannot be determined
____9. What is the frequency of an electromagnetic wave having a wavelength of
300,000km?
a. More than 1 Hz
b. Less than 1 Hz
c. 1 Hz
d. Cannot be determined
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_____10. What is the wavelength of the wave with a frequency of 3 x 109 Hz?
a. 1.0 x 10-1 m
b. 1.0 x 101 m
c. 1.0 x 10-2 m
d. 1.0 x 102 m
Additional Activity
Directions: Make a Comic Strip about the scientist contributions on the development of
electromagnetic wave theory. Refer to the rubric below for your guidance in making your
output.
5 4 3 2
Content Concept is clearly evident.
Concept is evident;
Concept is acceptable:
Concept is limited;
Spelling and Grammar
There are no spelling, punctuation or grammar errorsNo errors
There are 1-3 spelling, punctuation or grammar errors
There are 4-5 spelling, punctuation or grammar errors
There are more than 5 spelling, punctuation, and grammar errors
Visual Effect Comic strip is incredibly exciting and interesting
Comic strip is very exciting and interesting
Comic strip is quite exciting and interesting
Comic strip is not interesting and exciting
Table 2. Rubric for Comic Strip
Score: ____ 15
Remember:
A comic strip is a sequence of drawings in boxes that tell an amusing story, or a
form of story-telling, which uses drawings or cartoon characters to tell a story.
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Key to Answers
Grade 10Q2W1 Science
Pre-test
1.A
2.D
3.B
4.C
5.D
6.A
7.B
8.C
9.C
10.A
Activity 1: Shine Like Rainbow
1. Red 1. F
2. Orange 2. T
3. Yellow 3. F
4. Green 4. T
5. Blue 5. T
6.Indigo 6. F
7. Violet 7. F
8. T
Activity 2
A: M
AT
CH
ME
!
1.C
2.D
3.B
4.A
5.E
Activity 2
B: L
ET
’S T
AL
K A
BO
UT
EM
!
1.T
2.T
3.F
4.F
5.F
Act
ivit
y 3
: So
lve
Me!
1. 1
.2 x
10
-4H
z
2. 1
.Hz
Activity 4: FILL ME!
1.Electric Field
2. Magnetic Field
3. Electromagnetic Wave
4. Perpendicular
5. Transverse
6. Electromagnetic Wave
Theory
7. Faraday
8. James Clerk Maxwell
9. Vacuum
10. 3.0 X 108m/S
Asse
ssm
en
t
1.A
2. D
3. B
4. C
5. D
6. A
7. B
8. C
9. C
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`
Can travel through
which includes
Electromagnetic
Radiation
Transfers kinetic
energy in form of
Range is called
the
Have
properties
of
Defined as
Defined as
SI unit
SI unit
Distance between
wave crests
Hertz
X-Rays
Defined as
Wavelength
Frequency
Electromagnetic
Waves
ELECTROMAGNETIC
SPECTRUM
Radiowaves
Microwaves
Infrared
SS
Visible Light
SS
Ultraviolet
SS
Gamma Rays
SS
Number of waves
per second
Meter
Vacuum
Vibrating electric and
magnetic field
moving through
space that carries
energy
Activity 5: COMPLETE ME!
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References
Books Robert L. Weber et.al. College physics. The McGraw Hill Companies. 5th ed. Herma D. Acosta et.al. Science Grade 10 Learners Material.Pasig City. Department of Education-Instructional Materials Council Secretariat (DepEd-IMCS), 2015. Herma D. Acosta et.al. Science Grade 10 Teachers Guidl.Pasig City. Department of Education-Instructional Materials Council Secretariat (DepEd-IMCS), 2015. Publications Joly C. Baradero. Weaving the Wave Learning. A Strategic Intervention Material for Grade 10-
Science.2nd quarter. Nilo Nhs /Tigbao District. Anjaylo B. Pascua. Gotta Catch ’EM All. A strategic IMs for Grade-10 Science. 2nd quarter. Websites https://imagine.gsfc.nasa.gov/science/toolbox/emspectrum1.html https://www.britannica.com/science/electromagnetic-spectrum https://www.teachengineering.org/lessons/view/clem_waves_lesson04 https://scijinks.gov/rainbow/#:~:text=A%20rainbow%20is%20caused%20by,droplet%2C%20it%20makes
%20a%20rainbow.) Images https://en.wikipedia.org/wiki/Heinrich_Hertz https://www.britannica.com/biography/AndreMarie-Ampere/media/1/21416/8352 aps.org/publications/apsnew/200807/physicshistory.cfm thoughtco.com/james-clerk- maxwell-inventor1991689 en.wikipedia.org/wiki/Michael_Faraday electromagnetic spectrum - https://www.researchgate.net
Development Team Mi Ultimo Adios
Writer: Ruby V. Caperida Editors: Margie Lou C. Jacob Laarni A. Adonis Kathleen Joy B. Padilla Joly C. Baradero Reviewer: Sandy R. Albarico Illustrator: Management Team:
Majarani M. Jacinto, CESO VI SDS-ZDS
Visminda Q. Valde, Ed.D
ASDS
Raymond M. Salvador, Ed.D ASDS
Juliet M. Magallanes, Ed.D
CID Chief
Florencio R. Caballero, DTE EPS-LRMDS
Sandy R. Albarico
EPS-Science
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Dr. Jose Rizal
JOSE RIZAL
https://imagine.gsfc.nasa.gov/science/toolbox/emspectrum1.htmlhttps://www.britannica.com/science/electromagnetic-spectrumhttps://www.teachengineering.org/lessons/view/clem_waves_lesson04https://scijinks.gov/rainbow/#:~:text=A%20rainbow%20is%20caused%20by,droplet%2C%20it%20makes%20a%20rainbowhttps://scijinks.gov/rainbow/#:~:text=A%20rainbow%20is%20caused%20by,droplet%2C%20it%20makes%20a%20rainbow