light
3 when
white is incident on a glass
and
emerges after refraction, it does
not form a spectrum
a spectrum . Explain?
Answers
Answer:
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Explanation:
Hi there !!
A glass prism is able to produce a spectrum , which is a patch of light obtained due to dispersion. This is because the opposite refracting faces of a glass prism are not parellal. Thus, the incident ray is not parellal to the emergent ray and is deviated by the angle of deviation.
A glass slab is a rectangular structure in which the opposite refracting faces are parellal to each other. The result is that , the emergent is parellal to the incident ray but is literally displaced from it.
Thus, a rectangular glass slab is unable to produce a spectrum due to the refracting faces being parellal to each other .