diverging lens concave lens of focal length f is equal to 15 cm from an image 10cm from the lens draw a scale diagram and prove that the object is placed at 30 cm away from the lens used a scale of 1 to 5
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Given, focal length, f = -15cm
image distance, v = -10cm
By lens formula,
1/f = 1/v - 1/u
so, 1/u = 1/v - 1/f
= 1/(-10) - 1/(-15)
= 1/15 - 1/10
= -1/30
u = -30cm from the lens.
Thus, the object is placed at 30cm from the concave lens.
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