BMST Waves, Sound, and Light

Question 1

What is the approximate speed of light in a vacuum?

Accepted Answer

3 × 10⁸ m/s

Answer

The speed of light in a vacuum is approximately 3 × 10⁸ meters per second (about 300,000 km/s).

Question 2

What type of wave is sound?

Accepted Answer

Longitudinal wave

Answer

Sound is a longitudinal wave because the particles of the medium vibrate parallel to the direction of wave travel, creating compressions and rarefactions.

Question 3

What is the relationship between frequency and wavelength for a wave traveling at constant speed?

Accepted Answer

They are inversely proportional

Answer

Since wave speed = frequency × wavelength, at constant speed, frequency and wavelength are inversely proportional — as one increases, the other decreases.

Question 4

When a light ray bounces off a surface at the same angle it hit, what phenomenon is occurring?

Accepted Answer

Reflection

Answer

Reflection occurs when a wave bounces off a surface, following the law that the angle of incidence equals the angle of reflection.

Question 5

What is the unit of frequency?

Accepted Answer

Hertz (Hz)

Answer

Frequency is measured in Hertz (Hz), which represents the number of complete wave cycles per second.

BMST - Basic Math and Science Test Practice Test

BMST - Basic Math and Science Test Practice Test

BMST Waves, Sound, and Light