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A concave mirror of focal length 15 cm f...

A concave mirror of focal length 15 cm forms an image having twice the linear dimenstions of the objet.The position of the object,when the image is virtual,will be

A

22.5 cm

B

7.5 cm

C

30 cm

D

45 cm

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MODERN PUBLICATION-UNIT TEST -06-EXERCISE
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  2. In an experiment ot find the focla length of a concave mirror,a graph ...

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  3. A concave mirror of focal length 15 cm forms an image having twice the...

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  4. When a ray of light enters a glass slab,then

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  6. In refraction,light waves are bent on passing from one medum to the se...

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  7. A ray of light having wavelength 720 nm enters in a glas of refractive...

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  8. Light of having wavelength lambda and of intensitty I0 passes through...

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  9. The apparent depth of water in cylindrical water tank of diameter 2 R ...

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  10. Mirage' is a phenomenon due to

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  15. A lens is made of flint glass(refractive index=1.5).When the lens is i...

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  16. A thin glass (refractie index = 1.5) lens has optical power of -5 D in...

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  17. Two thin lenses of focal length f1 and f2 are placed in contant .The f...

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  18. Two lenses of power +12 D and -2D are combined together.What is their ...

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  19. If two lenses of power +1.5 D and +1.0 D are placed in contact ,then t...

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  20. Flash light equipped witha new set of bateries,produces bright white ...

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