Match the corresponding entries of column 1 with column 2. [Where m is the magnification produced by the mirror] Column 1 Column 2 (A) m = - 2 (a) Convex mirror (B) m = - 1 2 (b) Concave mirror (C) m = + 2 (c) Real image (D) m = + 1 2 (d) Virtual image

A → b and c; B → b and c; C → b and d; D → a and d

A → a and c; B → a and d; C → a and b; D → c and d

A → a and d; B → b and c; C → b and d; D → b and c

A → c and d; B → b and d; C → b and c; D → a and d

EASY

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What is linear magnification?

Important Questions on Reflection of Light

EASY

Physics>Optics>Reflection of Light>Mirror Equation

An object is placed at a distance of

20 cm

from the pole of a concave mirror of focal length

10 cm

. The distance of the image formed is

EASY

Physics>Optics>Reflection of Light>Mirror Equation

An object of height

2.5 cm

is placed perpendicularly on the principal axis of a concave mirror of focal length

f

at a distance of

\frac{3}{4} f

What will be the nature of the image of the object and its height

HARD

Physics>Optics>Reflection of Light>Mirror Equation

A candle placed

25 cm

from a lens forms an image on the screen placed

75 cm

on the other side of the lens. The focal length and type of the lens should be

EASY

Physics>Optics>Reflection of Light>Mirror Equation

A concave mirror of focal length

15 cm

, forms an image having twice the linear dimensions of the object. The position of the object, when the image is virtual, will be

MEDIUM

Physics>Optics>Reflection of Light>Mirror Equation

A point object is moving uniformly towards the pole of a concave mirror of focal length $25 cm$ along its axis as shown below. The speed of the object is $1 {ms}^{- 1}$ . At $t = 0$ , the distance of the object from the mirror is $50 cm$ . The average velocity of the image formed by the mirror between time $t = 0$ and $t = 0.25 s$ is:

Question Image

MEDIUM

Physics>Optics>Reflection of Light>Mirror Equation

Match the corresponding entries of column 1 with column 2. [Where m is the magnification produced by the mirror]

	Column 1		Column 2
(A)	$m = - 2$	(a)	Convex mirror
(B)	$m = - \frac{1}{2}$	(b)	Concave mirror
(C)	$m = + 2$	(c)	Real image
(D)	$m = + \frac{1}{2}$	(d)	Virtual image

MEDIUM

Physics>Optics>Reflection of Light>Mirror Equation

To find the focal length of a convex mirror, a student records the following data:

Object pin	Convex Lens	Convex Mirror	Image Pin
22.2 cm	32.2 cm	45.8 cm	71.2 cm

The focal length of the convex lens is

f_{1}

and that of mirror is

f_{2}

. Then taking index correction to be negligibly small,

f_{1}

and

f_{2}

are close to:

HARD

Physics>Optics>Reflection of Light>Mirror Equation

An object is gradually moving away from the focal point of a concave mirror along the axis of the mirror. The graphical representation of the magnitude of linear magnification

(m)

versus distance of the object from the mirror

(x)

is correctly given by
(Graphs are drawn schematically and are not to scale)

EASY

Physics>Optics>Reflection of Light>Mirror Equation

To focal length of a concave mirror is 12 cm. Where should an object length 4 cm be placed so that an image 1 cm long is formed?

EASY

Physics>Optics>Reflection of Light>Mirror Equation

In the figure shown if the object 'O' moves towards the plane mirror, then the image I (which is formed after successive reflections from M₁ & M₂ respectively) will move:

EASY

Physics>Optics>Reflection of Light>Mirror Equation

An infinitely long rod lies along the axis of a concave mirror of focal length

f

, the nearer end of the rod is at a distance

u

(u > f)

from the mirror. Its image will have a length___

MEDIUM

Physics>Optics>Reflection of Light>Mirror Equation

A spherical mirror forms diminished virtual image of magnification

\frac{1}{3}

. Focal length is

18 cm

. The distance of the object is

HARD

Physics>Optics>Reflection of Light>Mirror Equation

A short linear object of length

b

lies on the axis of a concave mirror of focal length

f

at a distance

u

from the pole. The length of the image will be.

MEDIUM

Physics>Optics>Reflection of Light>Mirror Equation

Represent the union of two sets by Venn diagram for each of the following.

$X = {x | x$ is a prime number between $80$ and $100}$

$Y = {y | y$ is an odd number between $90$ and $100}$

MEDIUM

Physics>Optics>Reflection of Light>Mirror Equation

A square wire of side 1 cm is placed perpendicular to the principle axis of a concave mirror of focal length 15 cm at a distance of 20 cm. The area enclosed by the image of the wire is

EASY

Physics>Optics>Reflection of Light>Mirror Equation

An object is placed at 20 cm in front of a concave mirror produces three times magnified real image. What is the focal length of the concave mirror?

HARD

Physics>Optics>Reflection of Light>Mirror Equation

For a concave mirror, if virtual images formed, the graph between m and u is of the form

MEDIUM

Physics>Optics>Reflection of Light>Mirror Equation

An object moving at a speed of 5 m/s towards a concave mirror of focal length

f = 1 m

is at a distance of 9 m. The average speed of the image is

EASY

Physics>Optics>Reflection of Light>Mirror Equation

A luminous point object is moving along the principal axis of a concave mirror of focal length 12 cm towards it. When its distance from mirror is 20 cm its velocity is 4 cm/s. The velocity of the image in cm/s at that instant is:

MEDIUM

Physics>Optics>Reflection of Light>Mirror Equation

A thin road of length d/3 is placed along the principal axis of a concave mirror of focal length = d such that its image, which is real and elongated, just touches the rod. Find the length of the image?

What is linear magnification?

Important Questions on Reflection of Light

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