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Light from a point source in air falls o...

Light from a point source in air falls on a spherical glass surface. If `mu = 1.5`, and radius of curvature `= 20 cm`, the distance of light source from the glass surface is `100 cm` , at what position will the image be formed ? (NCERT Solved Example)

A

50cm

B

100cm

C

125cm

D

25cm

Text Solution

Verified by Experts

The correct Answer is:
B
`mu_(2)/v - mu_(3)/u=(mu_(2)-mu_(1))/R,1.5/v- 1/(-100)=(1.5-1)/((20))`
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Knowledge Check

  • From a point source a light falls on a spherical glass surface ( mu = 1.5 and radius of curvature = 10 cm ). The distance between point source and glass surface is 50 cm . The position of image is

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    `25 cm`
    B
    `50 cm`
    C
    `100 cm`
    D
    `150 cm`

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    C
    1 cm to the right
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    18 cm to the left

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