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Give three basic differences between rea...

Give three basic differences between real image and virtual image.

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A real image can be taken on a screen, because the refracted rays actually meet at a point on the screen. A virtual image cannot be taken on a screen, because the refracted rays only appear to come from a point and do not meet there actually.
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PRADEEP-REFLECTION AND REFRACTION-Short Q/A
  1. What is meant by optical centre of a lens?

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  2. Define first principal focal length of a convex lens.

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  3. Give three basic differences between real image and virtual image.

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  4. What is linear magnification produced by a lens? How is it related to ...

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  5. When is magnification positive or negative ?

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  6. In which of the following cases, linear magnification is positive?

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  7. A student focuses the image of a candle flame, placed at about 2 m fro...

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  8. Draw the refracted rays corresponding to incident ray 1 and 2

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  9. A ray of light passing through A retraces its path on reflection from ...

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  10. You are given a concave mirror of focal length 20 cm and a candle. Whe...

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  11. Can you change focal length of a given spherical mirror by changing th...

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  12. The linear magnification of a concave mirror can be positive or negati...

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  13. You are given a convex lens of focal length 30 cm. At what distance fr...

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  14. When is linear magnification of a convex lens positive and when is it ...

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  15. A real, inverted image of the size of object is to be formed by holdin...

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  16. A convex lens is used to focus the rays from the far off light bulb at...

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  17. Trace the course of a ray of ligth through a rectangular glass slab. F...

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  18. What is Snell's law of refraction? What does it imply?

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  19. From the course of a ray of light through a rectangular glass slab, ex...

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  20. In an experiment with a rectangular glass slab, for an angle of incide...

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