March 25, 2015• “Wavestown” sheet

1.Label the 7 types of EM waves

2.Try to list as many uses or locations for EM radiation in the picture

3.Take out notes & GIZMO

• Homework: Read/notes, chapter 22, 3 & 4. SkillsTutor due Friday.

radiomicro-

waveinfrared

visibleUV X-ray

gamma

Predict & Observe

• What do you think you will see?

–White light

–Red light

–Black light

Diffraction

Explain

• How did the temperature of the bulb affect the spectra that were observed?

• Relate the amount of energy to wavelength.

Refraction

• Animation

Spectra

Predict & Observe

• Do you think you will see emission or absorption spectra?

• What do you think a spectra of a compound will look like?

Explain

• Why did you see emission spectra?

• Why did the spectra of water look like it did?

Question 1

• A wave has a low speed, but a high frequency. What can be inferred about its wavelength?

• A. The distance a wave will vibrate from its resting point.

• B. The wavelength will be very long• C. It depends on how fast the speed is• D. The wavelength will be short

Answer 1

• A wave has a low speed, but a high frequency. What can be inferred about its wavelength?

• A. The distance a wave will vibrate from its resting point.

• B. The wavelength will be very long• C. It depends on how fast the speed is• D. The wavelength will be short

Question 2

• How is amplitude related to energy?• A. The larger the amplitude, the more energy

a wave carries• B. The larger the amplitude, the less energy a

wave carries• C. The shorter the amplitude, the more

energy a wave carries• D. Amplitude is not related to energy

Answer 2

• How is amplitude related to energy?• A. The larger the amplitude, the more

energy a wave carries• B. The larger the amplitude, the less energy a

wave carries• C. The shorter the amplitude, the more

energy a wave carries• D. Amplitude is not related to energy

Question 3

• What is the distance between two adjacent wave compressions?

• A. 1 m/s• B. 1 wavelength• C. 1 Hz• D. 1 amplitude

Answer 3

• What is the distance between two adjacent wave compressions?

• A. 1 m/s• B. 1 wavelength• C. 1 Hz• D. 1 amplitude

Question 4

Ultraviolet light has a higher frequency than infrared light has. Which statement about visible light is true?•A. Blue light has a longer wavelength than orange light has.•B. Green light has a higher frequency than violet light has.•C. Yellow light has a shorter wavelength than blue light has.•D. Red light has a lower frequency than green light has.

Answer 4• Ultraviolet light has a higher frequency than

infrared light has. Which statement about visible light is true?

• A. Blue light has a longer wavelength than orange light has.

• B. Green light has a higher frequency than violet light has.

• C. Yellow light has a shorter wavelength than blue light has.

• D. Red light has a lower frequency than green light has.

Question 5

• Which light interaction explains why you can see things that do not produce their own light?

• A. absorption• B. reflection• C. refraction• D. scattering

Answer 5

• Which light interaction explains why you can see things that do not produce their own light?

• A. absorption• B. reflection• C. refraction• D. scattering

Spectra II

• High Resolution Solar Spectra

The Sun

• In other wavelengths…