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The refractive index of the material of a double convex lens is 1.5 and its focal length is 5 cm. If the radii of curvature are equal, the value of the radius of curvature is ………. cm.

(a)

6.5

(b)

5

(c)

8

(d)

5.6


Question ID - 153217 :-

The refractive index of the material of a double convex lens is 1.5 and its focal length is 5 cm. If the radii of curvature are equal, the value of the radius of curvature is ………. cm.

(a)

6.5

(b)

5

(c)

8

(d)

5.6

1 Answer
5876 Votes
3537

Answer Key : (b) -

5



Next Question :

A ray of light is incident normally on face AB of a prism as shown in the figure. A liquid of refractive index  is placed on the face AC of the prism. The prism is made of glass of refractive index 3/2. The limit of  for which total internal reflection takes place on face AC is

(a)

 <

(b)

 <

(c)

(d)

 <  


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