A circular planar wire loop is dipped in a soap solution and afte… - Vidyadip

MCQ

$A$ circular planar wire loop is dipped in a soap solution and after taking it out, held with its plane vertical in air. Assuming thickness of film at the top very small, as sunlight falls on the soap film, & observer receive reflected light

A
the top portion appears dark while the first colour to be observed as one moves down is red.
B
the top portion appears violet while the first colour to be observed as one moves down is indigo.
✓
the top portion appears dark while the first colour to be observed as one move down is violet.
D
the top portion appears dark while the first colour to be observed as one move down depends on the refractive index of the soap solution.

✓

Answer

Correct option: C.

the top portion appears dark while the first colour to be observed as one move down is violet.

c

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