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The image of a candle is formed by a con...

The image of a candle is formed by a convex lens on a screen. If the lower half of the lens is painted black to make it completely opaque, will the full size of image be obtained ?

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Yes, the image will still be full size as shown in Fig. Onle the intensity of the image wil be reduced.
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PRADEEP-RAY OPTICS-Short Answer(b)
  1. Within a glass slab, a double convex air bubble is formed. How would t...

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  2. Why does a convex lens of glass mu = 1.5 behave as a diverging lens wh...

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  3. A diverging lens of focal length F is cut into two idential parts, eac...

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  4. Draw a plot showing the variation of power of a lens with the wavelen...

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  5. A lens whose radii of curvature are different is forming the image of ...

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  6. The image of a candle is formed by a convex lens on a screen. If the l...

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  7. A convex lens forms the image of the sun at a distance of 10 cm. Where...

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  8. An equiconvex lens of focal length 15 cm is cut into two equal halves ...

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  9. A lens shown in Fig. 6(b).75 is made of two different materials. A poi...

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  10. What is focal length and power of a rectangular glass slab ?

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  11. How does focal length of a convex lens change if violet light is used ...

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  12. Two thin lenses of power + 3 D and - 1 D are held contact with each ot...

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  13. In Fig., line AB represents a lens through which course of rays is as ...

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  14. Explain with reason how the power of a diverging lens changes when (...

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  15. A ray of light suffers lateral displacement on passing through a paral...

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  16. Prove that mu = (1)/(sin C)' where C is the critical angle.

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  17. What are optical fibers ? Give three appilications of these fibres.

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  18. A microscope is focussed on a dot on the bottom of the beaker. Some oi...

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  19. What is meant by power of a lens ? What is one dioptre ?

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  20. How do magnification and focal length change for a combination of thin...

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