Physics · JEE

Online Practice: Refraction of light at plane and spherical surfaces, thin lens formula and lens maker formula for JEE

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Part of Optics in JEE Main Physics.

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Q1PhysicsUnit 16: Optics

The distance between an electric lamp and a screen is

d=1

m. A convergent lens of focal length

\boldsymbol{f}=21 \mathrm{cm}

is placed between the lamp and the lens such that a sharp image of the lamp filaments is formed on the screen. This question has multiple correct options

Q2PhysicsUnit 16: Optics

A student focussed the image of a candle flame on a white screen using a convex lens. He noted down the position of the candle screen and the lens as under: Position of candle

=12.0 \mathrm{cm}

Position of convex lens

=\mathbf{5 0 . 0} \mathrm{cm}

Position of the screen

=88.0 \mathrm{cm}

What will be the nature of the image formed if he further shifts the candle towards the lens?

Q3PhysicsUnit 16: Optics

Astigmatism for a human eye can be removed by using an additional:

Q4PhysicsUnit 16: Optics

An object is placed at

40 \mathrm{cm}

from the optic centre of a convex lens on its principal axis. if the focal length of the lens is

24 \mathrm{cm}

, find how far from the lens the screen should be placed to obtain a well-defined image.

Q5PhysicsUnit 16: Optics

White light is incident normally on a glass slab. Inside the glass slab,

Q6PhysicsUnit 16: Optics

Three lenses in contact have a combined focal length of

12 \mathrm{cm}

. When the third lens is removed the combined focal length becomes

60 \mathrm{cm}

. The third lens is :

Q7PhysicsUnit 16: Optics

The term refraction of light is best described by:

Q8PhysicsUnit 16: Optics

A diverging meniscus lens of 1.5 refractive index has concave surface of radii 3 and 4 cm.The position of the image, if an object is placed

12 \mathrm{cm}

in front of the lens, is

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