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Q.

Assertion : The formula connecting u, v and f for a spherical mirror is valid only for mirrors sizes which are very  small compared to their radii of curvature. 
Reason : Laws of reflection are strictly valid for plane surface, but not for large spherical.

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a

If both Assertion and Reason are true and Reason is the correct explanation of Assertion

b

If both Assertion and Reason are true but Reason is not correct explanation of Assertion

c

If Assertion is true but Reason is false

d

If Assertion is false but Reason is true 

answer is C.

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Detailed Solution

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1) The aperture of the mirror to be very small which  implies that the size of the mirror shall  be very small as compared  to their radii of curvature.
2) Laws  of reflection are valid for a spherical surfaces equally as it is for plane surfaces.
 

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