Physics · JEE

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

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Part of Optics in JEE Main Physics.

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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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