Question

What is the wavelength of an electromagnetic wave that has a frequency of 7.80 * 10 ^ 14 Hz in a vacuum? (The speed of light in a vacuum is 3.00 * 10 ^ 8 m/s.)

A. 1.22 * 10 ^ - 15 * m
B. 3.85 * 10 ^ - 7 * m
C. 2.34 * 10 ^ 23 * m
D. 2.60 * 10 ^ 6 * m​

Answer 1

B.) 3.85 x 10⁻⁷ m

Step-by-step explanation:

To find the wavelength, you can use the following formula:

wavelength = speed of light / frequency

Since you have been given both the speed of light and frequency, you can plug these values into the equation to find wavelength.

wavelength = speed of light / frequency

wavelength = (3.00 x 10⁸ m/s) / (7.80 x 10¹⁴ Hz)

wavelength = 3.85 x 10⁻⁷ m