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A burning candle whose flame is 1.5 cm t...

A burning candle whose flame is 1.5 cm tall is placed at a certain distance in front of a convex lens. An image of candle flame is received on a white screen kept behind the lens. The image of flame also measures 1.5 cm. If `f` is the focal length of convex lens, the candle is placed.

A

at `f`

B

between `f` and `2f`

C

at `2f`

D

beyond `2f`

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LAKHMIR SINGH & MANJIT KAUR-REFRACTION OF LIGHT-Exercise
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  2. A virtual, erect and magnified image of an object is to be obtained wi...

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  3. A burning candle whose flame is 1.5 cm tall is placed at a certain dis...

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  4. A lens of focal length 12 cm forms an upright image three times the si...

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  5. If an object is placed 21 cm from a converging lens, the image formed ...

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  6. An object is placed at the following distances from a convex lens of f...

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  7. When an object is placed at a distance of 36 cm from a convex lens, an...

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  8. a) Draw a diagram to show how a converging lens focusses parallel rays...

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  9. Write the formula for a lens connnecting image distance (v), object di...

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  10. What is the nature of the image formed by a convex lens if the magnifi...

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  11. What is the nature of the image formed by a convex lens if the magnifi...

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  12. What is the position of image when an object is placed is at a distanc...

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  13. Describe the nature of image formed when an object is placed at a dist...

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  14. At what distance from a converging lens of focal length 12 cm must an ...

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  15. State and explain the New Cartesian Sign Convention for spherical lens...

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  16. An object 4 cm high is placed at a distance of 10 cm from a convex len...

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  17. A small object is so placed in front of a convex lens of 5cm focal len...

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  18. Find the position and nature of the image of an object 5 cm high and 1...

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  19. Calculate the focal length of a convex lens which produces a virtual i...

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  20. An object is placed at a distance of 100 cm from a converging lens of ...

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