Daily TAKS Connection:Wave Types, Characteristics, and Interactions

IPC(5): The student knows the effects of waves on everyday life. The student is expected to:

(A) demonstrate wave types and their characteristics through a variety of activities such as modeling with ropes and coils, activating tunings forks, and interpreting data on seismic waves..

(B) demonstrate wave interactions including interference, polarization, reflection, refraction, and resonance within various materials.

Foldable Instructions

Construct a two door, shutter fold foldable Materials:

Foldable handout Scissors Pen Colored

pencils/crayons

Instructions: Fold the paper along the

solid fold lines (front side facing you)

Record your name, date and period on the reverse

Color the 2 doors (transverse wave, compression wave) each a different color

Compression Waves

rarefaction-the less dense region of a compression wave compression-the more dense region of a compression wave wavelength-measured from the start of one compression to

the start of the next compression TASK: Match the letter with the corresponding wave

characteristic under the compression wave door.

wavelength

Transverse Waves

has crests and troughs crest – high point of the wave trough – low point of the wave

wavelength – from crest to crest or trough to trough Amplitude is distance from crest or trough to the resting position of the wave

larger the amplitude, the greater the energy

TASK: Following the instructions on the LH side under the transverse wave door of your foldable

Velocity of a Wave

Frequency - number of waves that pass a fixed point per second measured in hertz (Hz); waves/second (1/s) for sound waves, determines the pitch of the

sound (how high or how low a note sounds) Velocity – speed and direction of a wave

measured in meters per second (m/s) Wavelength

Measured in meters (m)

Tasks

Using the velocity of a wave equation found on the formula chart, solve the problem shown under the compression wave door, RH side

Answer the question under the transverse wave door, RH side

Let’s review Interactions

Constructive Interference waves add up

Destructive Interference waves cancel each

other

Reflection

Reflection incident beam normal reflected beam the law of reflection states that the angle of

incidence equals the angle of reflection

Refraction

Refraction bending of light when changing mediums

depends on speed of light in each medium light bends toward normal when slowing down

and away from normal when speeding up.

Resonance

Resonance the ability of an object to vibrate at natural

frequency when it absorbs energy standing waves vibrate at natural frequencies

example: rim of glass, strings on a violin, bells

Polarization

Polarization when light vibrates in one direction

Ex. Polarizing sunglasses

Apply Your Knowledge

Using the cards, match the wave interaction with its definition and the picture that shows that type of interaction.

Begin Matching Now!!

Question

When trying to catch a fish in water, a bear needs to take into account the way light bends as it moves from water into air or it will miss the fish and go hungry. The bending of light as it passes from one medium into another is known as –

Question

Diverging lenses are useful to people who

suffer from nearsightedness because the

lenses can cause images of distant objects to

be focused on the retina. Lenses allow images

to be focused on the retina because of —

Question

One tuning fork is struck and placed next to an identical fork. The two forks do not touch. The second tuning fork starts to vibrate because of –

Question

A guitar player is seated next to a piano. The piano player strikes an E key on the piano. The guitarist reports that this causes the E string on his guitar to vibrate. What is the name of this phenomenon?

Question

The image on the screen is inverted because light rays –

A. condense as they pass through the pinhole

B. travel through the opening in straight lines

C. refract as they strike the screen

D. are polarized by the materials of the screen

Question

When a DVD is read, laser light touches the DVD surface and is then measured at location A. What allows light to return to location A after striking the DVD surface?

Question

An empty cup was tightly covered with plastic

wrap, and a few grains of salt were sprinkled

on top of the plastic. When a tuning fork was

struck and placed slightly above the plastic

wrap, the salt began to move. Which

characteristic of waves does the movement

of the salt best demonstrate?

Last Question!

Calculate the velocity of the wave shown?