Match the corresponding entries of column - 1 with column - 2 [where m is the magnification produced by the mirror] Column-I Column-II (i) m = - 2 (a) Convex mirror (ii) m = - 1 2 (b) Concave mirror (iii) m = + 2 (c) Real image (iv) m = + 1 2 (d) Virtual image

i→ b and c; ii → b and c; iii → b and d; iv → a and d

i → a and d; ii → b and c; iii → b and d; iv → b and c

i→ c and d; ii → b and d; iii → b and c; iv → a and d.

i→ a and c; ii → a and d; iii → a and b; iv → c and d

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In a concave mirror experiment, an object is placed at a distance $x_{1}$ from the focus and the image is formed at a distance $x_{2}$ from the focus. The focal length of the mirror would be

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Important Questions on Ray Optics

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Physics Crash Course MHT-CET>Chapter 19 - Ray Optics>Exercise 1>Q 91

As the position of an object

(u)

from a concave mirror is varied, the position of the image

(v)

also varies. By letting the

u

change from 0 to

+ \infty

the graph between

v

versus

u

will be

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Physics Crash Course MHT-CET>Chapter 19 - Ray Optics>Exercise 1>Q 92

An object is placed at a distance

u

from a concave mirror and its real image is formed on the screen placed at distance

v

from the mirror. If

f

is the focal length of the mirror, then the graph between

\frac{1}{v}

versus

\frac{1}{u}

is (magnitude only)

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Physics Crash Course MHT-CET>Chapter 19 - Ray Optics>Exercise 1>Q 93

A square wire of side $3 cm$ is placed $25 cm$ away from a concave mirror of focal length $10 cm .$ What is the area enclosed by the image of the wire? [The centre of the wire lies on the axis of the mirror, with its two sides normal to the axis]

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Physics Crash Course MHT-CET>Chapter 19 - Ray Optics>Exercise 1>Q 94

An object is placed at a distance of

40 cm

from concave mirror of focal length

15 cm .

If the object is displaced through a distance of

20 cm

towards the mirror, the displacement of the image will be

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Physics Crash Course MHT-CET>Chapter 19 - Ray Optics>Exercise 1>Q 96

The ratio of the diameter of the sun to the distance between the earth and the sun is approximately

0.009 .

The approximate diameter of the image of the sun formed by a concave spherical mirror of radius of curvature

0.4 m

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Physics Crash Course MHT-CET>Chapter 19 - Ray Optics>Exercise 1>Q 97

Match the corresponding entries of column $- 1$ with column $- 2$ [where $m$ is the magnification produced by the mirror]

Column-I		Column-II
(i)	$m = - 2$	(a)	Convex mirror
(ii)	$m = - \frac{1}{2}$	(b)	Concave mirror
(iii)	$m = + 2$	(c)	Real image
(iv)	$m = + \frac{1}{2}$	(d)	Virtual image

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Physics Crash Course MHT-CET>Chapter 19 - Ray Optics>Exercise 1>Q 99

A candle flame

2 cm

high is placed at distance of

2 m

from a wall. How far from the wall must a concave mirror be placed in order to form an image of the flame

6 cm

high on the wall?

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Physics Crash Course MHT-CET>Chapter 19 - Ray Optics>Exercise 1>Q 100

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

f

. The near end of the bar is at a distance

u > f

from the mirror. Its image will have a length

In a concave mirror experiment, an object is placed at a distance x1 from the focus and the image is formed at a distance x2 from the focus. The focal length of the mirror would be

Important Questions on Ray Optics

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In a concave mirror experiment, an object is placed at a distance $x_{1}$ from the focus and the image is formed at a distance $x_{2}$ from the focus. The focal length of the mirror would be