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?

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