SaraNextGen Study App [2022-23]
Last Updated On 23-10-2022 - By Sara

For spherical mirrors of small apertures, the radius of curvature is found to be

(a)

equal the focal length

(b)

twice the focal length

(c)

thrice the focal length

(d)

there is no relation between them


Question ID - 100079 :-

For spherical mirrors of small apertures, the radius of curvature is found to be

(a)

equal the focal length

(b)

twice the focal length

(c)

thrice the focal length

(d)

there is no relation between them

1 Answer
5876 Votes
3537

Answer Key : (b) -

twice the focal length



Next Question :

Two painters are working from a wooden board 5 m long suspended from the top of a building by two ropes attached to the ends of the plank. Either rope can withstand a maximum tension of 1040 N. Painter  of mass 80 kg is working at a distance of 1 m from one end. Painter  of mass 60 kg is working at a distance of m from the centre of mass of the board on the other side. Take mass of the board as 20 kg and . The range of so that both the painter can work safely is

a)

b)

c)

d)


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