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Differentiate between a glass slab and a glass prism. What happens when a narrow beam of 

(i) a monocromatic light and

(ii) white light passes through

(a) glass slab and (b) glass prism?

 

 

 

 

 
 
 
 
 

Answers (1)

• Prism has 2 inclined refracting surfaces whereas a glass slab has 2 parallel refracting surfaces.

i) When monochromatic light passes through a glass slab it gets displaced laterally whereas in prism it gets angularly displaced.

ii) When white light passes through a glass slab, it gets laterally displaced whereas in prism, dispersion takes place.

 

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Safeer PP

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