Question

a concave mirror produce 3 time enlarge image of an pbject placed at 10cm in front of it calculate the position and focal and lenght of mirror

Answer 1

solution.

Magnification= -v/u

or, -v/u= 3x/x

=> -v /-10= 3

=> v/10=3

=> v = 30 cm.

now, 1/v + 1/u= 1/f

=> 1/30+ (-1/10)= 1/f

=> (1 - 3 )/30= 1/f

=> -2/30= 1/f

=> f= -15 cm

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Answer 2

hey dear user I have attached the picture please see it it will help you to understand how the formation of the Physics equation