Physics Waves and Optics

Question 1

What is the wavelength of a wave traveling at 300 m/s with a frequency of 150 Hz?

Accepted Answer

2 m

Answer

0.5 m

Answer

1 m

Answer

3 m

Question 2

Which of the following is an example of a longitudinal wave?

Accepted Answer

Sound

Answer

Light

Answer

Water wave

Answer

X-ray

Question 3

When light passes from air into glass, which of the following occurs?

Accepted Answer

The speed and wavelength of light decrease.

Answer

The speed of light increases.

Answer

The wavelength of light increases.

Answer

The frequency of light changes.

Question 4

What is the angle of refraction when light enters water (refractive index n=1.33)  from air at an angle of 30°? (Use Snell's Law: n 1sinθ 1 =n 2sinθ 2).

Accepted Answer

22.1°

Answer

19.5°

Answer

25.2°

Answer

30°

Question 5

A slit experiment produces a bright fringe 3 mm away from the central maximum on a screen 2 m away. If the slit separation is 0.5mm, what is the wavelength of light used?

Accepted Answer

500 nm

Answer

400 nm

Answer

600 nm

Answer

700 nm