Question

‼️Please answer with simple explanation‼️
$\huge\underline\red{Question- 1}$
The focal length of a magnifying glass is 25 cm. What is its magnifying power?
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$\huge\underline\red{Question - 2}$
The magnifying power of a simple microscope is 6. What is the focal length of its lens?
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Answer 1

Answer:

1 The near point is taken to be 25 cm, so that a lens of focal length 2.5 cm has an angular magnification of 10. If you bring the object just a little inside the focal plane, the light emerging on the other side will diverge, as it were from a virtual image that is no longer at infinity

2 As we know, m=1+fD⇒6=1+f25⇒f=5 cm=0. 05 m.

Explanation:

hope it helps ya !!

Answer 2

The near point is taken to be 25 cm, so that a lens of focal length 2.5 cm has an angular magnification of 10. If you bring the object just a little inside the focal plane, the light emerging on the other side will diverge, as it were from a virtual image that is no longer at infinity.