Question

13 multiple choice 2 points
the chart below shows a portion of the electromagnetic spectrum.
gamma x - rays ultraviolet visible infrared microwave radio
a plastic filter is fitted over a light. the light emits white light, but the filter only lets the longest wavelengths of visible light pass through. which color would a person looking at the filtered light see?
green
red
violet
yellow
14 multiple choice 2 points
the figure below shows the regions of the electromagnetic spectrum.
radio microwave infrared visible ultraviolet x - ray gamma ray
which of the following statements best compares the wavelengths of the regions of the electromagnetic spectrum?
microwaves are shorter than x - rays.
infrared waves are longer than gamma rays.
radio waves are shorter than visible light waves.
ultraviolet waves are longer than visible light waves.
15 multiple choice 2 points

Explanation:

13

Step1: Recall visible light wavelengths

In the visible spectrum, red has the longest wavelength.

Step2: Analyze the filter condition

The filter lets the longest - wavelength visible light pass. Since red has the longest wavelength among the given options (green, red, violet, yellow), the color seen will be red.

14

Step1: Analyze each option

• Option1: Microwaves are shorter than x - rays

In the electromagnetic spectrum, microwaves have longer wavelengths than X - rays. So this option is wrong.

• Option2: Infrared waves are longer than gamma rays

Infrared waves have longer wavelengths than gamma rays. Gamma rays have very short wavelengths. This option is correct.

• Option3: Radio waves are shorter than gamma rays

Radio waves have longer wavelengths than gamma rays. So this option is wrong.

• Option4: Ultraviolet waves are longer than visible light waves

Ultraviolet waves have shorter wavelengths than visible light waves. So this option is wrong.

Answer:

1. red
2. Infrared waves are longer than gamma rays.