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Physics
Approximate thickness of oil film to observe interference of light (due to which it looks coloured) is
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Q. Approximate thickness of oil film to observe interference of light (due to which it looks coloured) is
Wave Optics
A
$10 \,mm$
B
$10^{-3} \,mm$
C
$10 \,pm$
D
$1 \,cm$
Solution:
The thickness must be in the order of visible light.