Solve Study Textbooks Guides

Join / Login

>>Class 12
>>Physics
>>Ray Optics and Optical Instruments
>>Optical Instruments : Microscope
>> $The focal lengths of the objective and t$

Question

The focal lengths of the objective and the eyepiece of a compound microscope are $2.0 c m$ and $3.0 c m$ , respectively. The distance between the objective and the eyepiece is $15.0 c m$ . The final image formed by the eyepiece is at infinity. The two lenses are thin. The distance, in $c m$ , of the object and the image produced by the objective, measure from the objective lens, are respectively.

A

$2.4$ and $12.0$

B

$2.4$ and $15.0$

C

$2.0$ and $12.0$

D

$2.0$ and $3.0$

Hard

Open in App

Solution

Verified by Toppr

Correct option is A)

for the image to form by objective is at infinity then the object distance must be $f = 2 c m$

and the final image is formed at focus of eyepiece i.e, $f = - 3 c m$

distance of image from objective lens is $15 - 3 = 12 c m$

option $C$ is correct

Solve any question of Ray Optics and Optical Instrument with:-

Patterns of problems

Patterns of problems

Was this answer helpful?

0

0

Similar questions

In a compound microscope, the image produced by the objective lens is :

What is the difference in the construction of an astronomical telescope and a compound microscope ? The focal lengths of the objective and eyepiece of a compound microscope are 1.25 cm and 5.0 cm, respectively. Find the position of the object relative to the objective in order to obtain an angular magnification of 30 when the final image is formed at the near point.

Define the magnifying power of a compound microscope when the final image is formed at infinity. Why must both the objective and the eyepiece of a compound microscope have short focal lengths? Explain.

In a compound microscope, the focal lengths of two lenses are 1.5 cm and 6.25 cm. If an object placed at 2 cm from objective and the final image is formed at 25 from eye lens, the distance between the two lenses is

The focal length of the objective and eye piece of a compound microscope are $1 c m$ and $5 c m$ respectively. An object is placed at a distance of $1.1 c m$ from objective. If final image is formed by at least distance vision, the magnifying power is:

View more

More From Chapter

Ray Optics and Optical Instruments

View chapter >

Revise with Concepts

Optical Instruments - Simple Microscope

ExampleDefinitionsFormulaes

Optical Instruments - Compound Microscope - Basic

ExampleDefinitionsFormulaes

Learn with Videos

Magnifying Glass

Magnifying power of simple microscope

Magnifying Power of Compound Microscope

Shortcuts & Tips

Problem solving tips

Problem solving tips

Memorization tricks

Memorization tricks

Important Diagrams

Important Diagrams

Mindmap

Common Misconceptions

Common Misconceptions

Cheatsheets

Practice more questions

Medium Questions