Free Printable Speed of Light

1.

Calculate the wavelength of light that has a frequency of 5.2 x 10^{12 1}/s.

a)

5.8 x 10 ^-5 m

b)

5.8 x 10 ^-7 m

c)

5.19 x 10 ¹⁴ m

d)

1.56 x 10 ²³ m

2.

EM waves _______ travel the same speed in a vacuum.

a)

never

b)

sometimes

c)

always

d)

can

3.

The relationship between wavelength and frequency is λ=c/f. Calculate the wavelength of light that has a frequency of 5.2 x 10¹²1/s. The speed of of light is 3.0x 10⁸ m/s.

a)

5.8 x 10 ^-5 m

b)

5.8 x 10 ^-7 m

c)

5.19 x 10 ¹⁴ m

d)

1.56 x 10 ²³ m

4.

IRAS, the Infrared Astronomy Satellite launched by NASA in 1983, had a detector that measured infrared or heat radiation from different regions of space. What is the frequency of infrared light that has a wavelength of 1.10 X 10^-6 m?

a)

3.67 x 10^-15 Hz

b)

3.67 x 10^-3 Hz

c)

2.73 x 10² Hz

d)

2.73 x 10¹⁴ Hz

5.

What is the speed of light?

a)

3.0x10⁸ ms

b)

3.0x10⁸ m/s

c)

6.626x10^-34Js

d)

6.626x10^-34J/s

6.

Match the following missing from the table

variable for wavelength

m/s

variable for frequency

f

unit for time

$\lambda$

Unit for speed of light

distance

term for d or m

s

7.

How long does it take light to travel a distance of 8 x 10¹⁵ m in a vacuum?

a)

3.75x10⁸

b)

3.75x10^-8

c)

2.66x10⁷

d)

2.66x10^-7

8.

What is the speed of light in a vacuum?

a)

$3.0 \times 10^8 \, \text{m/s}$

b)

$3.0 \times 10^6 \, \text{m/s}$

c)

$3.0 \times 10^10 \, \text{m/s}$

d)

$3.0 \times 10^5 \, \text{m/s}$

9.

Which of the following equations represents the relationship between energy, mass, and the speed of light?

a)

$E = mc^2$

b)

$E = mv^2$

c)

$E = mc$

d)

$E = m^2c$

10.

If light travels from air into water, what happens to its speed?

a)

It decreases

b)

It increases

c)

It remains the same

d)

It becomes zero

11.

How long does it take for light to travel from the Sun to the Earth, a distance of approximately 1.496 x 10^11 meters?

a)

About 8 minutes

b)

About 8 seconds

c)

About 8 hours

d)

About 8 days

12.

What is the wavelength of light with a frequency of $6 \times 10^{14} \, \text{Hz}$ ? (Speed of light = $3 \times 10^8 \, \text{m/s}$ )

a)

$5 \times 10^{-7} \, \text{m}$

b)

$5 \times 10^{-6} \, \text{m}$

c)

$5 \times 10^{-8} \, \text{m}$

d)

$5 \times 10^{-9} \, \text{m}$

13.

Which scientist is credited with the theory that the speed of light is constant in a vacuum?

a)

Albert Einstein

b)

Isaac Newton

c)

Galileo Galilei

d)

Niels Bohr

14.

What is the effect of gravity on the speed of light according to General Relativity?

a)

It bends the path of light

b)

It slows down light

c)

It speeds up light

d)

It has no effect

15.

In which medium does light travel the fastest?

a)

Vacuum

b)

Water

c)

Glass

d)

Diamond

Speed of Light

Total questions: 15

Worksheet time: 15mins

Similar Resources on Wayground