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Standard XII
Physics
Question

A ray of light is incident on a hollow glass prism as shown. Then the ray will undergo :
330867_a0691d85f02f4a50a6898b51fcdc8482.png
  1. deviation and dispersion both
  2. deviation but not dispersion
  3. dispersion but no deviation
  4. neither deviation nor dispersion

A
neither deviation nor dispersion
B
deviation and dispersion both
C
dispersion but no deviation
D
deviation but not dispersion
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Solution
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Answer is D
Surfaces of the hollow prism behaves like glass slabs thus there is no dispersion. The incident light is refracted through the glass slab.
Hence, when a ray of light is incident on a hollow glass prism, there will be neither dispersion nor deviation.

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