Light Energy: Waves and Color

What is a key difference between electromagnetic waves and sound waves?

• Electromagnetic waves require a medium to travel, while sound waves do not.

• Sound waves can travel through a vacuum, while electromagnetic waves cannot.

• Electromagnetic waves can travel through a vacuum, while sound waves require a medium (like air or water).

• Both electromagnetic and sound waves can travel through a vacuum.

How are the wavelength, frequency, and energy of light related?

• Longer wavelengths relate to higher frequency and higher energy.

• Shorter wavelengths relate to lower frequency and higher energy.

• Shorter wavelengths relate to higher frequency and higher energy.

• Wavelength and frequency are equal although energy is not the same.

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How do some snakes, like rattlesnakes and pit vipers, hunt in total darkness?

• They have highly developed night vision that allows them to see in low light.

• They use echolocation to detect prey in their environment.

• They detect infrared radiation (heat) from their prey using specialized pits.

• They rely on their sense of smell to track prey in the dark.

What is the primary mechanism by which microwave ovens heat food?

• They generate high-frequency radio waves that directly burn the food.

• They cause water molecules within the food to vibrate, generating heat.

• They emit infrared radiation that cooks the food from the outside in.

• They use ultraviolet light to sterilize and warm the food.

Which of the following is a characteristic of ultraviolet (UV) light?

• It has longer wavelengths than visible light and is felt as heat.

• It has enough energy to penetrate cells and cause damage.

• It is primarily used for radio communication and radar.

• It is visible to the human eye as a deep violet color.