1. True or False: EM waves need a medium to travel through.
Transverse
True or False: EM waves need a medium to travel through.

2. Which EM wave has the highest frequency?
False
Which EM wave has the highest frequency?

3. How are sound waves different from EM waves?
Gamma Rays
How are sound waves different from EM waves?

4. What type of waves do heat lamps give off?
They are Longitudinal
What type of waves do heat lamps give off?

5. What type of waves give us a sunburn?
Infrared
What type of waves give us a sunburn?

6. Which EM wave has the longest wavelength?
Ultraviolet
Which EM wave has the longest wavelength?

7. Glass is what kind of material?
Radio Waves
Glass is what kind of material?

8. Transparent
Will EM waves with a low frequency have a longer or shorter wavelength?

9. What is the darkest part of a shadow?
Longer
What is the darkest part of a shadow?

10. What is the lighter/fuzzy part of a shadow?
Umbra
What is the lighter/fuzzy part of a shadow?

11. True or False: Opaque materials will not let light pass through.
Penumbra
True or False: Opaque materials will not let light pass through.

12. How is light reflected off a horizontal surface polarized?
True
How is light reflected off a horizontal surface polarized?

13. Horizontally
Convert 24cm to feet

14. 0.79
Convert 25 m to km

15. What is the wavelength of an EM wave with a frequency of 105 Hz?
0.025
What is the wavelength of an EM wave with a frequency of 105 Hz?

16. What is the frequency of an EM wave if the wavelength is 620 nm?
3 km
What is the frequency of an EM wave if the wavelength is 620 nm?

17. What kind of waves are EM waves?
4.8 x 1014 Hz
What kind of waves are EM waves?