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21. When light waves pass from one material to another, the property of the wave that never changes is its a. Frequency b. Speed c. Wavelength d. Direction 22. As a light ray moves from air (n=1) to amber it deviates 15.7 degrees from its 40 degrees angle of incidence. Amber is a fossil resin from a pine tree and is optically denser than air. What is speed of light in amber? a) 1.9210^8 m/s b) 310^8 m/s c) 4.68*10^8 m/s 23. Linseed oil N Water N' Diagram above shows a ray of light traveling through air towards a thin layer of linseed oil (n = 1.5) resting on top of water (n=1.33). The ray approaches the linseed oil at an angle of incidence of 45°. Find the angle of refraction at the air-linseed oil boundary. a) 32.1° b) 28.1° c) 45° 24. For the problem above, find the angle of refraction at the linseed oil-water boundary. a) 32.1° b) 28.1° c) 45° 25. What is the value of the unknown angle (theta) in the following diagram? 30° 90° ? A. 30 degrees B. 45 degrees C. 90 degrees D. 60 degrees

          21. When light waves pass from one material to another, the property of the wave that never changes is its
a. Frequency
b. Speed
c. Wavelength
d. Direction

22. As a light ray moves from air (n=1) to amber it deviates 15.7 degrees from its 40 degrees angle of incidence. Amber is a fossil resin from a pine tree and is optically denser than air. What is speed of light in amber?
a) 1.92*10^8 m/s
b) 3*10^8 m/s
c) 4.68*10^8 m/s

23.
Linseed oil
N
Water
N'
Diagram above shows a ray of light traveling through air towards a thin layer of linseed oil (n = 1.5) resting on top of water (n=1.33). The ray approaches the linseed oil at an angle of incidence of 45°. Find the angle of refraction at the air-linseed oil boundary.
a) 32.1°
b) 28.1°
c) 45°

24. For the problem above, find the angle of refraction at the linseed oil-water boundary.
a) 32.1°
b) 28.1°
c) 45°

25. What is the value of the unknown angle (theta) in the following diagram?
30°
90°
?
A. 30 degrees
B. 45 degrees
C. 90 degrees
D. 60 degrees

$21. When light waves pass from one material to another, the property of the wave that never changes is its a. Frequency b. Speed c. Wavelength d. Direction 22. As a light ray moves from air (n=1) to amber it deviates 15.7 degrees from its 40 degrees angle of incidence. Amber is a fossil resin from a pine tree and is optically denser than air. What is speed of light in amber? a) 1.92*10^8 m/s b) 3*10^8 m/s c) 4.68*10^8 m/s 23. Linseed oil N Water N' Diagram above shows a ray of light traveling through air towards a thin layer of linseed oil (n = 1.5) resting on top of water (n=1.33). The ray approaches the linseed oil at an angle of incidence of 45°. Find the angle of refraction at the air-linseed oil boundary. a) 32.1° b) 28.1° c) 45° 24. For the problem above, find the angle of refraction at the linseed oil-water boundary. a) 32.1° b) 28.1° c) 45° 25. What is the value of the unknown angle (theta) in the following diagram? 30° 90° ? A. 30 degrees B. 45 degrees C. 90 degrees D. 60 degrees$

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