Free Printable REFRACTION BASICS

1.

___________ is the change of direction of light rays as they pass from one medium to another.

a)

Reflection

b)

Refraction

c)

Diffraction

d)

Interference

2.

Which of the following remains constant when refraction occurs?

a)

Velocity

b)

Wavelength

c)

Frequency

d)

Amplitude

3.

The __________ is an imaginary line that is perpendicular to the boundary between two media.

a)

normal

b)

incident ray

c)

refracted ray

d)

lateral displacement

4.

The __________ is the angle between the light ray and the normal IN AIR.

a)

incident angle

b)

reflected angle

c)

refracted angle

d)

angle of deviation

5.

Which of the following cannot be used to calculate the refractive index of a medium?

a)

$\frac{\sin i}{\sin r}$

b)

$\frac{c_1}{c_2}$

c)

$\frac{\lambda_1}{\lambda_2}$

d)

$\frac{f_1}{f_2}$

6.

The refractive index of four substances are stated below:

Water - n=1.33

Glass - n=1.50

Ethyl Alcohol - n=1.36

Diamond - n=2.42

In which substance will light travel the slowest?

a)

Water

b)

Glass

c)

Ethyl Alcohol

d)

Diamond

7.

If the refractive index of a medium is 2.00 then this means that light will

a)

travel 2 times as fast in that medium.

b)

travel $\frac{1}{2}$ as fast in that medium.

c)

split into exactly 2 light beams.

d)

become $\frac{1}{2}$ as narrow in that medium.

8.

How is the refractive index of a material related to the velocity of light in the material?

a)

Direct Relationship

b)

Inverse Relationship

c)

No correlation

d)

More Information is needed

9.

If the incident angle in air is $60\degree$ and the refracted angle in glass is $35\degree$ then the angle of deviation is

a)

$95\degree$

b)

$60\degree$

c)

$35\degree$

d)

$25\degree$

10.

The speed of light in air is $3.0\ x\ 10^8\ \frac{m}{s}$ . The speed of light in medium X is $2.0\ x\ 10^8\ \frac{m}{s}$ . What is the refractive index of medium X?

a)

n=0.67

b)

n=1.50

c)

n=1.00

d)

n=5.00

11.

The velocity of light in air is $3.0\ x\ 10^8\ \frac{m}{s}$ . The refractive index of medium Z is 3.00. What is the velocity of light in medium Z?

a)

$3.0\ x\ 10^8\ \frac{m}{s}$

b)

$9.0\ x\ 10^8\ \frac{m}{s}$

c)

$1.0\ x\ 10^8\ \frac{m}{s}$

d)

$6.0\ x\ 10^8\ \frac{m}{s}$

12.

In the diagram, which angle is the angle of refraction?

a)

A

b)

B

c)

C

d)

D

13.

In the diagram, which angle is the angle of incidence?

a)

A

b)

B

c)

C

d)

D

14.

In the diagram, which line is the normal?

a)

w

b)

x

c)

y

d)

z

15.

If $r=15^{\degree}$ and $n=1.33$ then $\sin i$ =

a)

$1.33\ x\ \sin\ 15\degree$

b)

$\frac{1.33}{\sin15\degree}$

c)

$\frac{\sin15\degree}{1.33}$

d)

$1.33\div\sin15\degree$

REFRACTION BASICS

Total questions: 15

Worksheet time: 15mins

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