Free Printable HW 3 Light; Snell's Law

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HW 3 Light; Snell's Law

Total questions: 20

Worksheet time: 2hrs 40mins

Name

Class

Date

What is the speed of light in a vacuum?

3.0 x 10⁸ m/s

1.0 x 10⁸ m/s

10 m/s

5.0 x 10⁸ m/s

What is the speed of light in a material that has an index of refraction of 1.88?

3.0 x 10⁸ m/s

1.88 x 10⁸ m/s

1.6 x 10⁸ m/s

5.64 x 10⁸ m/s

If a material has an index of refraction of 2.3, how fast will light travel through that material?

2.3 x 10⁸ m/s

6.9 x 10⁸ m/s

3.0 x 10⁸ m/s

1.3 x 10⁸ m/s

If light travels through a piece of glass at 2.1 x 10⁸ m/s, what is the index of refraction of the glass?

1.14

1.43

2.10

6.3

Light travels from air (n = 1.00) into a "mystery" material. The incident ray of light hits the surface at angle of 43^o and the refracted ray enters the mystery material at an angle of 27^o. What is the index of refraction of the mystery material? n₁sin(Θ₁) = n₂sin(Θ₂)

1.5

1.0

0.67

2.1

Light travels from air (n = 1.00) into a second material. The incident ray of light hits the surface at angle of 64^o and the refracted ray enters the second material at an angle of 32^o. What is the index of refraction of the second material? n₁sin(Θ₁) = n₂sin(Θ₂)

1.4

0.90

0.53

1.7

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

Light has the lowest velocity in which medium?
flint glass n=1.70
barium glass n=1.60
crown glass n=1.523
water n=1.33
diamond n=2.45

diamond

water

flint glass

barium glass

The _________ of light can change when light is refracted because the medium changes.

frequency

medium

wavelength

transparency

10.

When light passes at an angle to the normal from one material into another material in which its speed is higher

it is bent toward the normal.

it always lies along the normal.

it is unaffected.

it is bent away from the normal.

11.

When light passes at an angle to the normal from one material into another material in which its speed is lower

it is bent towards the normal.

it always lies along the normal.

it is unaffected.

it is bent away from the normal.

12.

What do all waves have in common?

nothing

they carry energy

they absorb light

you can see them

13.

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

maintain its original speed

accelerate while it is in glass

increase its speed

reduce its speed

14.

What is this image an example of?

Reflection

Diffusion

Refraction

15.

The index of refraction, is defined as the ratio of the speed of light in a vacuum (c = 3x10^8 m/s) to the speed of light in a medium. What is the index of refraction of a medium where the speed of light is 0.7c ? Round off your values to 3 sig. figs.

1.42

1.43

1.28

1.29

16.

A higher index of refraction means that the wave travels _____________ the speed of light in a vacuum in that medium.

Faster than

Slower than

Equal to

Answer is not here

17.

1.42

1.43

1.28

1.29

18.

The formula to calculate the refractive index is

n=cv

n=v/c

n=c/v

v=nc

19.

This shows the phenomenon known as....

reflection

refraction

mirrors

focal point

20.

Glass has a _____________ index of refraction (or "n") than air.

Equal

Greater

Less

Impossible to say

Reset

HW 3 Light; Snell's Law

Total questions: 20

Worksheet time: 2hrs 40mins

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