Physics: Light Waves Test Corrections

Front

What is the shortest wavelength color in the visible light spectrum?

Back

Violet.

Front

What type of image is formed by a plane mirror?

Back

The image is upright and the same size as the object.

Front

Define the angle of incidence in reflection.

Back

The angle between the incident ray and the normal at the point of incidence.

Front

What is the relationship between wavelength and frequency in waves?

Back

Wavelength is inversely proportional to frequency; as wavelength increases, frequency decreases.

Front

What is the wavelength of a wave if it travels 6 meters?

Back

6 m.

Front

Why are gamma rays more hazardous than radio waves?

Back

Gamma rays are damaging to biological cells and DNA.

Front

What happens to light rays when they strike a plane mirror?

Back

They reflect at the same angle as they hit the mirror (angle of incidence equals angle of reflection).

Front

What is the principle of superposition in wave theory?

Back

When two or more waves overlap, the resultant wave is the sum of the individual waves.

Front

What is the speed of light in a vacuum?

Back

Approximately 3 x 10^8 meters per second.

Front

What is the law of reflection?

Back

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