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A student has obtained a point image of ...

A student has obtained a point image of a distant object using a convex lens. To find the focal length of the convex lens, he should measure the distance between the :

A

Convex lens and the object

B

Convex lens and the screen

C

Object and the screen

D

Convex lens and the object and also between the object and the screen

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The correct Answer is:
B
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ZEN PUBLICATION-LIGHT - REFLECTION AND REFRACTION-ZEN ADDITIONAL QUESTIONS SECTION (MULTIPLE - CHOICE QUESTIONS)
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  9. Which of the following can make parallel beam of light when light from...

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  10. A full length image of a distant tall building can definitely be seen ...

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  12. The laws of reflection hold good for

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  14. The speed of light in vacuum is

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  15. Virtual images formed by a convex mirror are always ………..

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  16. Which of these can be used to obtain a real image having the same size...

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  17. The distant object method can be used to find the focal length of whic...

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  18. A light ray is incident on a concave mirror which passes through the c...

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  19. When a biconvex lens made of glass is immersed in a liquid which is op...

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  20. The power of a spherical lens is given by :

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