Electromagnetic waves are transverse waves with a wide range of benefits and uses. Some of the waves also pose a risk and are hazardous to human tissues.
Which of these groups has the highest frequency?
What happens to the frequency and wavelength of electromagnetic waves as the wave energy increases from radio to gamma?
The wavelength and the frequency both increase.
The wavelength increases and the frequency decreases.
The wavelength decreases and the frequency increases.
Which of these pairs of electromagnetic waves are used to cook food?
Microwaves and infrared rays
Radio waves and ultraviolet waves
Microwaves and X-rays
Which of these statements is true regarding visible light?
Visible light makes up a large proportion of the electromagnetic spectrum and has a wide range of frequencies.
Visible light is detected by the eye and makes up a limited range of frequencies in the electromagnetic spectrum.
Visible light is a longitudinal wave.
Which of these statements about ultraviolet radiation is NOT true?
Ultraviolet radiation is used to cook food.
Ultraviolet radiation can kill bacteria in water to make it safe to drink.
Ultraviolet radiation can be good for the skin.
Which of the following are most harmful to bodily tissue?
Radio waves, microwaves and infrared
Microwaves, infrared and visible light
Ultraviolet rays, X-rays and gamma rays
Which electromagnetic wave is used in satellite communication?
Which of the following is true for X-rays?
X-rays are absorbed by soft tissue.
X-rays are absorbed by bone.
X-rays are reflected by soft tissue.
At what speed do electromagnetic waves travel through a vacuum?
Which type of electromagnetic radiation is emitted from the nucleus of atoms?