Question

Explanation for possible interference on a home mirror?

Answer 1

I have:  A laser pointer. A non-polarizing beam-splitter. A mirror. Two concave lenses. An uneven shaky floor, some chairs, and tape. Patience that spans an entire day. This is the sketch of the setup that I have in my mind: enter image description here where the laser, lenses, and so on are taped to the chairs.  How close do the two paths lengths have to be to each other? In my case, the two path lengths will differ by dozens of centimeters.

Answer 2

Hey !

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The ways of possible interference on a home mirror is for two types.

# 2 ways ✓✓

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Thanks !