MCAT Physics Question 106: Answer and Explanation

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Question: 106

1. If a light ray has a frequency of 5.0 × 10¹⁴ Hz, in which region of the electromagnetic spectrum is it located?

A. X-ray
B. UV
C. Visible
D. Infrared

Correct Answer: C

Explanation:

It is unnecessary to memorize the entire electromagnetic spectrum for Test Day; however, it is important to know that the visible spectrum runs from 400–700 nm. We can calculate the wavelength of this light ray:

This wavelength falls within the visible spectrum has a red-orange color.

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