Question

Monochromatic light with wavelength 538 nm is incident __________.

A. Perpendicularly
B. At an angle
C. From a distance
D. In a vacuum

Answer 1

Monochromatic light with wavelength 538 nm is incident perpendicularly.

Step-by-step explanation:

The correct answer is A. Perpendicularly.

When monochromatic light with a specific wavelength is incident perpendicularly, it means that the light is striking the surface at a 90° angle.

In this case, the light with a wavelength of 538 nm is incident perpendicularly, meaning that it is striking the surface directly and vertically.

For example, if you shine a flashlight directly on a wall, the light from the flashlight is incident perpendicularly on the wall.