Evaluative 4S 26/8/2024

The angle of incidence of a wave is equal to the:

• Angle of refraction

• Angle of reflection

• Angle of diffraction

• Angle of polarisation

The law of reflection states that the incident ray, reflected ray and normal are:

• Parallel

• Perpendicular

• In the same plane

• None of the above

Reflection of waves can be observed in:

• Ripple tanks

• Mirrors

• Echoes

• All of the above

The speed of light in a vacuum is:

• 3.0 x 10^8 m/s

• 3.0 x 10^5 m/s

• 3.0 x 10^3 m/s

• 3.0 x 10^2 m/s

The frequency of a wave is equal to the:

• Amplitude of the wave

• Wavelength of the wave

• Speed of the wave

• Inverse of the period of the wave

The angle of incidence is:

• The angle between the incident ray and the reflected ray.

• The angle between the incident ray and the normal to the reflecting surface.

• The angle between the reflected ray and the normal to the reflecting surface.

• The angle between the incident ray and the refracted ray.

According to the law of reflection:

• The angle of incidence is always greater than the angle of reflection.

• The angle of incidence is always less than the angle of reflection.

• The angle of incidence is equal to the angle of reflection.

• The angle of incidence and angle of reflection have no relationship.

When a sound wave reflects off a wall, what remains constant?

• Wavelength only

• Frequency only

• Wave speed only

• Both wavelength and frequency

If a light wave reflects off a mirror, how does its relationship between wavelength and frequency change?

• The wavelength increases, and the frequency decreases.

• The wavelength decreases, and the frequency increases.

• The wavelength and frequency remain directly proportional.

• The relationship becomes unpredictable.

Imagine a water wave reflecting off a smooth beach. Since the wave speed in both water and sand is different, what can we say about the reflected wave?

• The reflected wave will have the same wavelength and frequency as the incident wave.

• The reflected wave will maintain its original speed.

• The reflected wave will have a different wavelength but the same frequency.

• The reflected wave will have a different frequency but the same wavelength.