4F - 3. The Electromagnetic Spectrum

What is the full range of electromagnetic waves called?

• Electromagnetic field

• Electromagnetic spectrum

• Electromagnetic waves

• Electromagnetic radiation

What is the speed of light in a vacuum?

• 299,792 kilometers per second

• 150,000 kilometers per second

• 300,000 kilometers per second

• 400,000 kilometers per second

Which type of electromagnetic wave has the shortest wavelength?

• Gamma rays

• Radio waves

• Infrared waves

• Microwaves

What type of waves are electromagnetic waves?

• Longitudinal waves

• Transverse waves

• Standing waves

• Surface waves

What is emitted when charged particles oscillate?

• Gravitational waves

• Mechanical waves

• Electromagnetic waves

• Sound waves

What is the primary use of microwaves?

• To transmit radio signals

• To heat food in microwave ovens

• To sterilize medical equipment

• To take X-ray photographs

What type of radiation is emitted by the Sun that can be harmful to living cells?

• Infrared radiation

• Gamma rays

• Ultraviolet radiation

• X-rays

What is the effect called when light changes direction as it passes through an object?

• Dispersion

• Diffraction

• Refraction

• Reflection

What type of image is formed in a plane mirror?

• Inverted image

• Lateral image

• Virtual image

• Real image

What happens to light when it enters a denser medium?

• It speeds up

• It slows down

• It reflects

• It disperses