Jason uses a lens with focal length of 11.0 cm as a magnifier by holding it...

Jason uses a lens with focal length of 11.0 cm as a magnifier by holding it right up to his eye. He is observing an object that is 9.0 cm from the lens.

What is the angular magnification of the lens used this way if Jason's near-point distance is 25 cm?

Expert Solution

ANS : From 1/f = 1/ v - 1/u

Given : f = 11 cm . u = 9 cm , v = ?

1 / 11 = 1 / v - 1 / 9

1 / 11 + 1 / 9 = 1 / v

20 / 99 = 1/ v

99 / 20 = v

v = 4. 95 cm

The angular magnification of the lens used this way if Jason's near-point distance is 25

M_a = 25 / f + 1

Ma = 25 / 11 + 1

Ma = 2. 2727 +1

M_a = 3. 2727

genius_generous answered 2 years ago

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