Question

concave lens has focal length of 20cm at what distance from the lens a5cm stall object





of Eye Centre at all of the episode that is found in at 15 cm from the lens 5 cm from the lens also calculate the size

Answer 1

hey dear here your answer;

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➡Given data:

Focal length of concave lens: f=−20 cm
Height of the object: ho=5 cm
Distance of the image: di=−15 cm

Calculation of object distance:

From the lens equation,

1f=1di−1do−120=1−15−1do1do=120−1151do=5300do=60 cm

calculation of size of image;

|m|=dido=hihohi=(dido)ho =(1560)5 =1.25 cm

☺ Hope this helps you deaR ✌✌✌.

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