﻿ A convex lens of focal length f is placed somewhere in between an object and a screen. The distance between the object and the screen is x. If the numerical value of the magnification produced by the lens is m, the focal length of the lens is:   : Kaysons Education

# A Convex Lens Of Focal Length f is Placed Somewhere In Between An Object And A Screen. The Distance Between The Object And The Screen Is x. If The Numerical Value Of The Magnification Produced By The Lens Is m, The Focal Length Of The Lens Is:

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## Question

### Solution

Correct option is

For real image, m is –ve.

#### SIMILAR QUESTIONS

Q1

The far-point of a short-sighted eye is 200 cm. The power of the lens is:

Q2

The near point of a short-sighted person is 10 cm and he desires to read a book 30 cm away from him. The power of the lens to be used by him is:

Q3

The distance between an object and the screen is 100 cm. A lens produces an image on the screen when placed at either of the positions 40 cm apart. The power of the lens is:

Q4

A thin equiconvex lens has focal length 10 cm and refractive index 1.5. One of its faces is now silvered and for an object placed at a distance u in front of the lens, the image coincides with the object. The value of u is:

Q5

The plane face of a plano-convex lens of focal length 20 cm is silvered. What type of mirror will it become and of what focal length

Q6

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Q7

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Q8

A plano-convex lens of f = 20 cm is silvered at plane surface. Now, f will be (μ = 1.5):

Q9

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Q10

A ray of light suffers minimum deviation when incident on a 60o prism of refractive index  The angle of incidence is: