Multiple Choice Question

Question

The diagram below shows the frequencies of various types of electromagnetic radiation.

Which of the following statements correctly compares the frequency and energy of infrared waves and ultraviolet waves?

A.
Infrared waves have lower frequencies than ultraviolet waves. Since frequency and energy are directly proportional, infrared waves also have less energy than ultraviolet waves.

B.
Infrared waves have lower frequencies than ultraviolet waves. Since frequency and energy are inversely proportional, infrared waves also have more energy than ultraviolet waves.

C.
Infrared waves have higher frequencies than ultraviolet waves. Since frequency and energy are directly proportional, infrared waves also have more energy than ultraviolet waves.

D.
Infrared waves have higher frequencies than ultraviolet waves. Since frequency and energy are inversely proportional, infrared waves also have less energy than ultraviolet waves.

Answer 1

The correct answer is:

A. Infrared waves have lower frequencies than ultraviolet waves. Since frequency and energy are directly proportional, infrared waves also have less energy than ultraviolet waves.

Explanation: In the electromagnetic spectrum, infrared waves have longer wavelengths and lower frequencies than ultraviolet waves. Energy is directly proportional to frequency (E = hf, where E is energy, h is Planck's constant, and f is frequency). Therefore, since infrared waves have lower frequencies, they also have lower energy compared to ultraviolet waves.