1.

in displacement method we use a lens of focal length f and dis†an ce between pbject and screen is 60cm possible value for focal length (1)-15cm (2) 30cm (3) 12cm (4) 20c

Answer» in displacement method we use a lens of focal length f and dis†an ce between pbject and screen is 60cm possible value for focal length (1)-15cm (2) 30cm (3) 12cm (4) 20c


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