Reflection and Refraction

How does light behave as it enters these mediums?

• continue its path as straight line.
• bends toward the normal
• bends away from the normal
• reflects

The formula to calculate the refractive index is

• n=cv
• n=v/c
• n=c/v
• v=nc

When a red light ray travels from air into a glass block, its

• velocity increases and its wavelength decreases 
• velocity decreases and its frequency stays the same
• velocity decreases and its frequency increases
• velocity remains the same and its wavelength decreases

A ray of light traveling from air into crown glass strikes the surface at an angle of 30^o. What is the angle of refraction? (air n=1, crown glass n=1.532)

• 3.06^o

• 12.34^o

• 19.05^o

• 50.00^o

If the refractive index of the water is 1.33, what is the value of x?

• 0.44 m

• 0.74 m

• 2.26

• 2.56

Given the refractive index of:

flint glass n=1.70

crown glass n=1.523

water n=1.33

diamond n=2.45

Light has the highest velocity in which medium?

• flint glass

• crown glass

• water

• diamond

According to Willebord Snell, light passing from air to glass will cause the light to

• maintain its speed in glass

• increase its speed in glass

• bend towards the normal

• accelerate in the glass

Light travels through a liquid at 2.25 x 10 ⁸ ms^-1. What is the refractive index of the liquid? (speed of light in vacuum = 3.00 x 10 ⁸ ms^-1)

• 1.33

• 1.18

• 1.00

• 0.75

Which one shows the angle of refraction of the light?

• A

• B

• C

• D

Light travels from air (n = 1.00) into a glass block that has an index of refraction of 1.46. The incident ray of light hits the surface at angle of 45^o. At what angle will the light ray enter the glass? n₁sin(Θ₁) = n₂sin(Θ₂)

• 45^o

• 29^o

• 31^o

• 64^o