Which of the following lists the types of electromagnetic waves in order of increasing frequency?

• Radio waves, microwaves, infrared, visible light

• Microwaves, radio waves, visible light, infrared

• Infrared, visible light, microwaves, radio waves

• Visible light, infrared, microwaves, radio waves

As light passes through air to water the speed​

(a)   and the wave ​ (b)   .

• increases
• decreases
• remains the same
• becomes zero
• bends
• stays straight

How does the refraction of light enable the functioning of lenses in eyeglasses?

• By reflecting light to the retina

• By bending light to focus on the retina

• By absorbing light to reduce glare

• By scattering light to improve vision

Which electromagnetic wave is most commonly associated with causing sunburn?

• Radio waves

• Microwaves

• Infrared

• Ultraviolet

Which of the following electromagnetic waves has the shortest wavelength?

• Radio waves

• Microwaves

• X-rays

• Infrared

Discuss the role of electromagnetic waves in wireless communication. Provide an example of a device that uses this technology.

• They are used to heat food; example: microwave oven

• They transmit data over distances; example: mobile phone

• They are used to illuminate areas; example: flashlight

• They are used to detect objects; example: radar

What is the primary use of microwaves in everyday life it to

(a)  

• Cook food
• Sterilizing medical equipment

• Detecting metal

• Producing X-ray images

Night vision goggles use

(a)   to find the ​ (b)   of objects.

• Radio waves

• Microwaves

• Infrared
• Ultraviolet

• Heat

How does the refraction of light contribute to the formation of a rainbow?

• Light is absorbed by water droplets

• Light is scattered by air particles

• Light is bent and separated into colors by water droplets

• Light is reflected back into the atmosphere

Which electromagnetic wave is used in medical imaging to view inside the human body?

• Radio waves

• Microwaves

• X-rays

• Infrared