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Solution


Q.

Read the passage carefully and answer the following questions from (i) to (v):

Binoculars, like telescopes, produce magnified images of far away objects. Figure shows a typical binocular design. Each side of the binoculars is like a small telescope: light enters a convex objective lens, which inverts the image. The light then travels through two prisms that are used to completely reflect the incoming ray to invert the image again, so that the viewer sees an image that is upright compared to the object.

 

(ii) Prisms are used in binoculars:
1 for reflection  
2 for refraction  
3 for dispersion  
4 for total internal reflection  

Ans.

(4)