An astronomer using a refracting telescope sees an image of two gas clouds with identical shapes but displaced slightly from each other.One is composed of blue light and the other red light.The most likely explanation is:
A) the Doppler effect.
B) chromatic aberration.
C) dust absorption.
D) interstellar scattering.

Question

Quizplus · Accepted Answer

Chromatic aberration occurs because lenses have different refractive indices for light of different colors, causing them to be focused at slightly different positions. This leads to images with color fringes or images of different colors being displaced from each other, as described in the scenario.

An Astronomer Using a Refracting Telescope Sees an Image of Two