A candle is placed 30 cm in front of a diverging lens with focal length -20 cm.

Question

A candle is placed 30 cm in front of a diverging lens with focal length -20 cm.

The image is virtual, upright, reduced in size and 12 cm in front of the lens.

real, inverted, reduced in size and 12 cm behind the lens. virtual, inverted,

reduced in size and 12 cm in front of the lens. virtual, upright, enlarged and 12 cm behind of the lens.

real, upright, enlarged and 60 cm behind the lens.

virtual, inverted, enlarged and 60 cm in front of the lens. real, inverted, enlarged and 60 cm behind the lens.

Explanation / Answer

1/v - 1/ u = 1/ f

1/v = 1/f+1/ u = 1/ -20 + 1/ -30

v= - 12

virtual upright ,reduced size , in fornt of the lense

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