Understanding Waves and the Electromagnetic Spectrum

How does changing the frequency of sound affect its properties?

• It changes the color of the sound.

• It alters the pitch of the sound.

• It modifies the speed of the sound.

• It affects the amplitude of the sound.

What happens to the color of light when its frequency is changed?

• The light becomes brighter.

• The light changes speed.

• The light changes color.

• The light becomes dimmer.

What is the rounded speed of light used in calculations?

• 3.02 x 10^8 meters per second

• 2.99 x 10^8 meters per second

• 3.01 x 10^8 meters per second

• 3.00 x 10^8 meters per second

How long does it take for sunlight to reach Earth?

• About 5 minutes

• About 8.3 minutes

• About 10 minutes

• About 12 minutes

Which of the following is NOT part of the electromagnetic spectrum?

• Radio waves

• Sound waves

• Gamma rays

• X-rays

What type of wave is a microwave oven based on?

• Standing wave

• Surface wave

• Transverse wave

• Longitudinal wave

Which part of the electromagnetic spectrum is used in thermal imaging?

• Infrared

• Microwave

• Radio

• Ultraviolet

What is the primary source of ultraviolet light for us?

• Stars

• Artificial lights

• The Sun

• The Moon

Which electromagnetic wave has the shortest wavelength?

• Gamma rays

• Microwaves

• Infrared

• Radio waves

What is the wavelength range for FM radio in megahertz?

• 148 to 168 MHz

• 88 to 108 MHz

• 108 to 128 MHz

• 128 to 148 MHz