Chapter 11 & 12 Test PSH

Front

What type of wave is emitted from warm objects?

Back

Infrared waves are emitted from warm objects, allowing us to detect heat.

Front

Electromagnetic waves can transfer energy without a(an) _________.

Back

Medium. Electromagnetic waves can travel through a vacuum.

Front

How much of the electromagnetic spectrum is made up of visible light?

Back

Only a small portion of the electromagnetic spectrum is made up of visible light.

Front

Which section of the spectrum is the ONLY one we can see?

Back

Visible Light is the only section of the electromagnetic spectrum that is visible to the human eye.

Front

Modern physicists believe light is what?

Back

Both a particle and a wave, demonstrating dual nature.

Front

What is the electromagnetic spectrum?

Back

The electromagnetic spectrum is the range of all types of electromagnetic radiation, from radio waves to 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 (km/s).

Front

What are the two main components of electromagnetic waves?

Back

Electric fields and magnetic fields oscillate perpendicular to each other and to the direction of wave propagation.

Front

What is the relationship between wavelength and frequency?

Back

Wavelength and frequency are inversely related; as wavelength increases, frequency decreases.

Front

What type of electromagnetic radiation has the highest energy?

Back

Gamma rays have the highest energy in the electromagnetic spectrum.