## If a magnifying glass has a power of 10.0 D, what is the magnification it produces when held 6.55 cm from an object?

Question

If a magnifying glass has a power of 10.0 D, what is the magnification it produces when held 6.55 cm from an object?

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3 days 2021-07-19T06:46:15+00:00 1 Answers 1 views 0

## Answers ( )

1. Answer: The magnification of the magnifying glass is -2.9

Explanation:

The equation for power is given as:

where,

P = Power = 10 D

f = focal length

Putting values in above equation, we get:

(Conversion factor: 1 m = 100 cm)

The equation for lens formula follows:

where,

v = image distance

u = Object distance = 6.55 cm

Putting values in above equation, we get:

Magnification (m) can be written as:

Putting values in above equation, we get:

Hence, the magnification of the magnifying glass is -2.9