Electromagnetic Radiation

Mr. Anderson explains electromagnetic radiation, starting with Herschel's experiment that discovered infrared rays. He describes the electromagnetic spectrum, highlighting the relationship between wavelength, frequency, and energy. The video covers practical examples of electromagnetic waves, their scale, and the inverse relationship between wavelength and frequency. Safety considerations regarding exposure to different types of radiation are also discussed.

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