1. 4th 9 Weeks Review Key

2. V= 2(1.5) = 3 m/s
f= 1/T = ¼ = .25 Hz
T= 1/f = 1/2 = .50 sec.

6. In which medium does light move slower?1. 2.

7. Real images are always (inverted/upright) while virtual images are always (inverted/upright).
An object is placed 10 m from a converging lens of focal length 50 m. How far from the lens will the image be formed?

10. Index of Refraction Fusion Photon
_____________________ discrete units of light energy.
_____________________ When two lighter nuclei combine to form a heavier nucleus.
______________________ The ratio of speed of light in a vacuum to the speed of light in a medium.

11. How many wavelengths?
Frequency?
Period?
Wave speed?

12. Air molecules are not closely spaced
What do waves carry?
Why can sound waves not be heard in space?
Air molecules are not closely spaced
Mark the nodes and antinodes.
Frequency?
Period?

13. Define Doppler effect:
What is the primary source that causes the Doppler effect to occur? (think Sheldon, big bang theory)
Define resonance and give two examples.

14. What are the two types of wave interference
What are the two types of wave interference? What would the wave look like when these two pass each other?

15. B frequency E A wavelength D F
There are two types of waves; longitudinal and transverse. Draw a diagram of each below.
As you move along the electromagnetic spectrum (beginning with radio waves) the ___________ increases while the ____________ decreases.
List 2 characteristics that all electromagnetic waves have in common. B
frequency E A
wavelength D F
Travel through empty space (vacuum and all travel at the speed of light C G

16. BAD WORDING
BAD WORDING