A beetle 4.50 m m long is examined with a simple magnifier of focal length f = 1

Question

A beetle 4.50mm long is examined with a simple magnifier of focal length f = 10.6cm
If the observer's eye is relaxed while using the magnifier, and has a near-point distance of 25 cm, what is the apparent length of the beetle? L? =   mm   SubmitMy AnswersGive Up

A beetle 4.50mm long is examined with a simple magnifier of focal length f = 10.6cm
If the observer's eye is relaxed while using the magnifier, and has a near-point distance of 25 cm, what is the apparent length of the beetle? L? =   mm   SubmitMy AnswersGive Up L? =   mm   L? =   mm   SubmitMy AnswersGive Up L? =   mm  

Explanation / Answer

M =L/L' =f/f'

4.5/L' =10.6/25

L' =10.61 mm

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