MEDIUM

JEE Advanced

IMPORTANT

Earn 100

A hemispherical paper weight contains a small flower on its axis of symmetry at a distance of $4 cm$ from its flat surface. Where is the flower appears to an observer when he looks at it along the axis of symmetry from the top? (Index of refraction of glass $= 1.5$ )

50% studentsanswered this correctly

Important Questions on Geometric Optics

MEDIUM

JEE Advanced

IMPORTANT

Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 7 - Geometric Optics>Objective Problems [Level 2]>Q 22

A thin plano-convex lens acts like a concave mirror of radius of curvature

20 cm

when its plane surface is silvered. The radius of curvature of the curved surface if index of refraction of its material is

1.5

will be

EASY

JEE Advanced

IMPORTANT

Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 7 - Geometric Optics>Objective Problems [Level 2]>Q 23

A ray of light, travelling in a medium of refractive index

μ

, is incident at an angle

i

on a composite transparent plate consisting of three plates of refractive indices

μ_{1}, μ_{2}

and

μ_{3}

. The ray emerges from the composite plate into a medium of refractive index

μ_{4}

, at angle

x

. Then,

MEDIUM

JEE Advanced

IMPORTANT

Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 7 - Geometric Optics>Objective Problems [Level 2]>Q 24

The

X - Z

plane separates two media

A

and

B

with refractive indices

μ_{1}

and

μ_{2}

respectively. A ray of light travels from

A

and

B

. Its directions in the two media are given by the unit vectors

{\hat{r}}_{A} = a \hat{i} + b \hat{j}

and

{\hat{r}}_{B} = α \hat{i} + β \hat{j}

respectively, where

\hat{i}

and

\hat{j}

are unit vectors in the

X

and

Y

directions. Then,

MEDIUM

JEE Advanced

IMPORTANT

Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 7 - Geometric Optics>Objective Problems [Level 2]>Q 25

Consider the situation as shown in figure. The point $O$ is the centre. The light ray forms an angle of $60 °$ with the normal.

Question Image

The normal makes an angle $60 °$ with the horizontal and the mirror makes an angle $60 °$ with the normal. The value of refractive index of that spherical portions so that light ray retraces its path is

MEDIUM

JEE Advanced

IMPORTANT

Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 7 - Geometric Optics>Objective Problems [Level 2]>Q 26

The figure shows an equi-convex lens. What should be the condition on the refractive indices so that the lens becomes diverging?

Question Image

MEDIUM

JEE Advanced

IMPORTANT

Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 7 - Geometric Optics>Objective Problems [Level 2]>Q 27

An object is kept at a distance of

16 cm

from a thin lens and the image formed is real. If the object is kept at a distance of

6 cm

from the same lens the image formed is virtual. If the size of the image formed are equal, the focal length of the lens will be

MEDIUM

JEE Advanced

IMPORTANT

Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 7 - Geometric Optics>Objective Problems [Level 2]>Q 28

The apparent depth of water in cylindrical water tank of diameter

2 R cm

is reducing at the rate of

x cc \min^{- 1}

when water is being drained out at a constant rate. The amount of water drained in

cc \min^{- 1}

is (

n_{1} =

refractive index of air,

n_{2} =

refractive index of water)

MEDIUM

JEE Advanced

IMPORTANT

Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 7 - Geometric Optics>Objective Problems [Level 2]>Q 29

A ray of light strikes a horizontal plane mirror at an angle of

45 °

. A second plane mirror is attached at an angle

θ

with it. If ray after reflection from second mirror runs parallel to the first mirror, then

θ

A hemispherical paper weight contains a small flower on its axis of symmetry at a distance of 4 cm from its flat surface. Where is the flower appears to an observer when he looks at it along the axis of symmetry from the top? (Index of refraction of glass =1.5)

Important Questions on Geometric Optics

Learn and Prepare for any exam you want !

A hemispherical paper weight contains a small flower on its axis of symmetry at a distance of $4 cm$ from its flat surface. Where is the flower appears to an observer when he looks at it along the axis of symmetry from the top? (Index of refraction of glass $= 1.5$ )