In a Michelson interferometer, what happens to the interference pattern if one o

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Question: In a Michelson interferometer, what happens to the interference pattern if one of the mirrors is moved away from the beam splitter?

Options:

Correct Answer: Fringes move apart

Solution:

Moving one mirror changes the path length of one beam, causing the fringes to move apart or closer depending on the direction of movement.

In a Michelson interferometer, what happens to the interference pattern if one of the mirrors is moved away from the beam splitter?

In a Michelson interferometer, what happens to the interference pattern if one of the mirrors is moved away from the beam splitter?

Step 1: Understand that a Michelson interferometer splits a light beam into two paths using a beam splitter.
Step 2: Recognize that each path has a mirror at the end that reflects the light back to the beam splitter.
Step 3: Know that when the light beams return to the beam splitter, they combine and create an interference pattern of bright and dark fringes.
Step 4: Realize that moving one of the mirrors changes the distance that one of the light beams travels.
Step 5: Understand that this change in distance affects the phase of the light waves when they recombine.
Step 6: Conclude that as one mirror is moved, the interference pattern (the fringes) will shift closer together or further apart.

Interference Patterns – The behavior of light waves when they overlap, leading to constructive or destructive interference.
Path Length Difference – The difference in distance traveled by two beams of light in an interferometer, which affects the interference pattern.
Fringe Movement – The shifting of bright and dark bands in the interference pattern due to changes in path length.