Multiple choice

Which of the following is an example of light interference?

  1. light that is blocked by a wall

  2. light that is absorbed by a black shirt

  3. the spectrum of colors reflected on a soap bubble

  4. translucent light shining through a lamp shade
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The colors seen on a soap bubble are caused by thin-film interference, where light waves reflecting off the inner and outer surfaces of the film overlap and interfere constructively or destructively.

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