Light and Sound

Front

What is the main difference between sound waves and light waves?

Back

Sound waves require a medium (like air or water) to travel, while light waves do not require a medium and can travel through a vacuum.

Front

Why can we communicate in space using radio waves?

Back

Because sound needs a medium (like air) to be carried, and space is a vacuum with no medium.

Front

What type of waves are primarily used in broadcasting?

Back

Radio Waves.

Front

How is the wavelength of a sound wave measured?

Back

The wavelength of a sound wave is measured from peak to peak or trough to trough.

Front

What type of wave frequency do microwaves rely on?

Back

Microwave frequency.

Front

What is a medium in the context of wave propagation?

Back

A medium is a substance through which a wave can travel, such as air, water, or solid materials.

Front

What are electromagnetic waves?

Back

Electromagnetic waves are waves that can travel through a vacuum and do not require a medium; they include radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays.

Front

What is the speed of light in a vacuum?

Back

The speed of light in a vacuum is approximately 299,792 kilometers per second (or about 300,000 kilometers per second).

Front

What is the relationship between frequency and wavelength in waves?

Back

Frequency and wavelength are inversely related; as the frequency increases, the wavelength decreases, and vice versa.

Front

What is the range of human hearing in terms of frequency?

Back

The range of human hearing is typically from 20 Hz to 20,000 Hz (20 kHz).