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A concave spherical surface of radius of...

A concave spherical surface of radius of curvature `10 cm` separates two mediums `X` and `Y` of refractive indices `4//3` and `3//2` respectively. Centre of curvature of the surfaces lies in the medium `X`. An object is placed in medium `X`.

A

image is always real

B

image is real if the object distance is greater than 90cm

C

image is always virtual

D

image is virtual if the object distance is less than 90 cm

Text Solution

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The correct Answer is:
C
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MOTION-RAY OPTICS-Exercise-2
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  2. Light ray is incident on a prism of angle A=60^(@)and refractive index...

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  3. A prism of refractive index sqrt(2) has a prism angle of 60^(@). At wh...

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  4. Statement I : White light gets dispersed when passed through a prism. ...

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  5. A ray of light enters a rectangular glass slab of refractive index sqr...

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  6. For two given statements : (1) Critical angle is greater for violet l...

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  7. For two given statements : (1) A prism can produce a minimum deviat...

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  8. Refractive index of a prism is sqrt(7//3) and the angle of prism is 60...

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  9. An object is placed at 10 cm from a lens and real image is formed with...

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  10. A thin symmetrical double convex lens of power P is cut into three par...

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  11. A thin linear object of size 1mm is kept along the principal axis of a...

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  12. A concave mirror and a convex lens are of the same focal length in air...

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  13. A convex lens of focal length 10 cm is in contact with a concave lens....

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  14. A concave spherical surface of radius of curvature 10 cm separates two...

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  15. If f(1) and f(2) represent the first and second focal lengths of a sin...

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  16. A concave mirror and a convex lens are of the same focal length in air...

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  17. The objective of a small telescope has focal length 120 cm and diamete...

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  18. A convex lens of focal length 20cm and a concave lens of focal length ...

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  19. The curvature radii of a concavo-convex glass lens are 20cmand 60cm. T...

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  20. A screen is placed 90 cm from an object. The image an object on the sc...

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