Physics · JEE

Refraction of light through a prism, microscope and astronomical telescope (reflecting and refracting) and their magnifying powers Concepts for JEE

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Concept explainer

Refraction of light through a prism, microscope and astronomical telescope (reflecting and refracting) and their magnifying powers is a core JEE Main Physics subtopic under Optics. Master the definitions, standard results, and typical MCQ patterns tested in JEE Main and Advanced.

Key points

Understand the definition and scope of Refraction of light through a prism, microscope and astronomical telescope (reflecting and refracting) and their magnifying powers in the JEE syllabus
Memorise key formulas and standard results linked to Refraction of light through a prism, microscope and astronomical telescope (reflecting and refracting) and their magnifying powers
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JEE tips

Revise Refraction of light through a prism, microscope and astronomical telescope (reflecting and refracting) and their magnifying powers with a one-page formula sheet before attempting mixed tests
After each practice set, log mistakes specific to Refraction of light through a prism, microscope and astronomical telescope (reflecting and refracting) and their magnifying powers and reattempt after 48 hours

Common trap

Students often rush Refraction of light through a prism, microscope and astronomical telescope (reflecting and refracting) and their magnifying powers questions without checking units, sign conventions, or boundary conditions — always verify assumptions before calculating.

Syllabus context

Part of Optics in JEE Main Physics.

Free sample questions

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Q1PhysicsUnit 16: Optics

A telescope gives an (inverted erect) and

\ldots \ldots .

(enlarged/diminished) image of a distant object. Choose the correct alternative.

Q2PhysicsUnit 16: Optics

A reflecting telescope utilises:

Q3PhysicsUnit 16: Optics

Large astronomical telescopes always use as objective

Q4PhysicsUnit 16: Optics

To increase the magnification of a telescope

Q5PhysicsUnit 16: Optics

A compound microscope has an objective lens of

1.0 \mathrm{cm}

focal length and an eye-piece of

2.5 \mathrm{cm}

of focal length. When the object is placed at

1.1 \mathrm{cm}

from the objective, the final image is at the least distance of direct vision. Thus, the magnification produced is

Q6PhysicsUnit 16: Optics

Assertion If objective and eye lenses of a microscope are interchanged then it can work as telescope. Reason The objective lens of telescope has small focal length.

Q7PhysicsUnit 16: Optics

A microscope is focused on a mark, then a glass slab of refractive index 1.5 and thickness of

3 \mathrm{cm}

is placed on the mark to get the mark again in focus, the microscope should be moved

Q8PhysicsUnit 16: Optics

When white light is incident on a prism, which of the following ray will experience lesser deviation?

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Frequently asked questions

What concepts in Refraction of light through a prism, microscope and astronomical telescope (reflecting and refracting) and their magnifying powers are essential for JEE?

Focus on core ideas across Refraction of light through a prism, microscope and astronomical telescope (reflecting and refracting) and their magnifying powers. JEE tests application, not just memorisation.