Physics
Find the power of a convex lens if the image formed is at a distance of 25 cm from the lens when the object is placed on the other side of the lens at 12 cm from the optical centre?

12.33 diopters
4.33 diopters
-12.33 diopters
-4.33 diopters

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Physics
'Mirage' is an example of

Refraction of light only
Refraction and total internal reflection of light
Total internal reflection of light only
Dispersion of light only

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