Understanding Light and Its Properties

What is light described as in the provided material?

• A form of sound energy

• A form of energy that helps us see things

• A type of chemical reaction

• A magnetic field

Light is a part of the electromagnetic spectrum that travels as what kind of waves?

• Longitudinal waves

• Sound waves

• Transverse waves

• Compression waves

Approximately how fast does light travel in a vacuum?

• 0.343 kilometers per second

• 10,000 kilometers per hour

• 299,792 kilometers per second

• 1.08 billion kilometers per hour

Which of the following is listed as a natural source of light?

• Lightbulb

• Candle

• Sunlight

• Television

Which of the following is listed as an artificial source of light?

• Jellyfish

• Lightning

• Volcano

• Lightbulb

Wavelength is defined as the distance between what on a wave?

• A crest and a trough

• Two crests or two troughs

• The beginning and end of a wave

• The amplitude and the frequency

What is the relationship between wavelength and frequency?

• The longer the wavelength, the higher the frequency.

• The shorter the wavelength, the lower the frequency.

• The longer the wavelength, the smaller the frequency.

• Wavelength and frequency are unrelated.

Which type of electromagnetic radiation is used in microwave ovens to cook and heat food?

• Radio waves

• Microwaves

• Infrared radiation

• Visible light

Which type of electromagnetic radiation allows us to see the world around us and comes in different colors?

• X-rays

• Gamma rays

• Ultraviolet radiation

• Visible light

Which type of electromagnetic radiation comes from the sun and is responsible for causing sunburns?

• Infrared radiation

• Ultraviolet radiation

• X-rays

• Radio waves