A magnifying glass is made of a combination of convergent lens of power $+ 20$ diopters and a divergent lens of power $- 4$ diopters. If the least distance of distinct vision is $25 c m$ , the magnifying power is:

Name: A magnifying glass is made of a combination of convergent lens of power + 20 diopters and a divergent lens of power - 4 diopters. If the least distance of distinct vision is 25 cm , the magnifying power is:
Uploaded: 2020-01-06
Description: Click here👆to get an answer to your question ✍️ A magnifying glass is made of a combination of convergent lens of power + 20 diopters and a divergent lens of power - 4 diopters. If the least distance of distinct vision is 25 cm , the magnifying power is:

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Answer 1

Given, $D = 25 c m$ ; $P_{n e t} = 16$ ; $f_{n e t} = \frac{1 0 0}{P _{e v}} = \frac{1 0 0}{1 6} = \frac{2 5}{4}$

Magnification, $M = 1 + \frac{D}{f _{n e t}}$

$M = 1 + \frac{2 5}{\frac{2 5}{4}} = 5$

Answer 2

Given,

D = 25 c m

;

P_{n e t} = 16

;

f_{n e t} = \frac{1 0 0}{P _{e v}} = \frac{1 0 0}{1 6} = \frac{2 5}{4}

Magnification,

M = 1 + \frac{D}{f _{n e t}}

M = 1 + \frac{2 5}{\frac{2 5}{4}} = 5

A magnifying glass is made of a combination of convergent lens of power $+ 20$ diopters and a divergent lens of power $- 4$ diopters. If the least distance of distinct vision is $25 c m$ , the magnifying power is:

3

4

5

7

Given, $D = 25 c m$ ; $P_{n e t} = 16$ ; $f_{n e t} = \frac{1 0 0}{P _{e v}} = \frac{1 0 0}{1 6} = \frac{2 5}{4}$

Magnification, $M = 1 + \frac{D}{f _{n e t}}$

$M = 1 + \frac{2 5}{\frac{2 5}{4}} = 5$

The image of an object is formed at the least distance of distinct vision from the lens of a simple microscope of focal length $2.5 c m$ . Its magnifying power is:

A convergent lens of power $16 D$ is used as a simple microscope. The magnification produced by the lens, when the final image is formed at least distance of distinct vision is:-

A simple microscope consists of a concave lens of power 10D and a convex lens of power 15 D. Its magnification at near point is
(least distance of distinct vision, D $=$ 25 cm)

The magnifying power of a simple microscope is $6$ The focal length of its in meters will be, if least distance of distinct vision is $25 c m$

The least distance of distinct vision is 25cm. The focal length of a convex lens of a simple microscope is 5 cm. Its magnifying power if the image is at near point

Revise with Concepts

Optical Instruments - Simple Microscope

Optical Instruments - Compound Microscope - Basic

A magnifying glass is made of a combination of convergent lens of power +20 diopters and a divergent lens of power −4 diopters. If the least distance of distinct vision is 25cm, the magnifying power is:

3

4

5

7

Given, D=25cm ;Pnet​=16; fnet​=Pev​100​=16100​=425​ Magnification, M=1+fnet​D​ M=1+425​25​=5

The image of an object is formed at the least distance of distinct vision from the lens of a simple microscope of focal length 2.5 cm. Its magnifying power is:

A convergent lens of power 16 D is used as a simple microscope. The magnification produced by the lens, when the final image is formed at least distance of distinct vision is:-

A simple microscope consists of a concave lens of power 10D and a convex lens of power 15 D. Its magnification at near point is (least distance of distinct vision, D = 25 cm)

The magnifying power of a simple microscope is 6 The focal length of its in meters will be, if least distance of distinct vision is 25 cm

The least distance of distinct vision is 25cm. The focal length of a convex lens of a simple microscope is 5 cm. Its magnifying power if the image is at near point

Revise with Concepts

Optical Instruments - Simple Microscope

Optical Instruments - Compound Microscope - Basic

A magnifying glass is made of a combination of convergent lens of power $+ 20$ diopters and a divergent lens of power $- 4$ diopters. If the least distance of distinct vision is $25 c m$ , the magnifying power is:

Given, $D = 25 c m$ ; $P_{n e t} = 16$ ; $f_{n e t} = \frac{1 0 0}{P _{e v}} = \frac{1 0 0}{1 6} = \frac{2 5}{4}$

Magnification, $M = 1 + \frac{D}{f _{n e t}}$

$M = 1 + \frac{2 5}{\frac{2 5}{4}} = 5$

The image of an object is formed at the least distance of distinct vision from the lens of a simple microscope of focal length $2.5 c m$ . Its magnifying power is:

A convergent lens of power $16 D$ is used as a simple microscope. The magnification produced by the lens, when the final image is formed at least distance of distinct vision is:-

A simple microscope consists of a concave lens of power 10D and a convex lens of power 15 D. Its magnification at near point is
(least distance of distinct vision, D $=$ 25 cm)

The magnifying power of a simple microscope is $6$ The focal length of its in meters will be, if least distance of distinct vision is $25 c m$