Electromagnetic Radiation

What did William Herschel discover when he measured the temperature of different colors of light?

• Ultraviolet rays

• Infrared rays

• X-rays

• Gamma rays

Which part of the electromagnetic spectrum is visible to the human eye?

• Gamma rays

• X-rays

• Visible light

• Radio waves

As the frequency of electromagnetic waves increases, what happens to their wavelength?

• It decreases

• It doubles

• It increases

• It remains the same

Which type of electromagnetic wave has the longest wavelength?

• Microwaves

• X-rays

• Gamma rays

• Radio waves

What is a potential danger of high-frequency electromagnetic waves?

• They can lower temperatures

• They can increase air pressure

• They can ionize cells and cause damage

• They can cause sound pollution