An object is placed 20 cm in front of a concave mirror of a radius of curvature 10 cm. The position of the image from the pole of the mirror is:

1. 7.67 cm

2. 6.67 cm

3. 8.67 cm

4. 9.67 cm

Subtopic:  Reflection at Spherical Surface |
 90%
From NCERT
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An object is at a distance of 30 cm in front of a concave mirror of focal length 10 cm. The image of the object will be:

1. smaller in size.
2. inverted.
3. between the focus and centre of curvature.
4. All of the above.

Subtopic:  Reflection at Spherical Surface |
 86%
From NCERT
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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 I. convex mirror
B. m = -1/2 II. concave mirror 
C. m = +2 III. real Image
D. m = +1/2 IV. virtual Image
 
A B C D
1. I & III I & IV I & II III & IV
2. I & IV II & III II & IV II & III
3. III & IV II & IV II & III I & IV
4. II & III II & III II & IV I & IV
Subtopic:  Reflection at Spherical Surface |
 74%
From NCERT
NEET - 2016
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When a concave mirror of focal length f is immersed in water, its focal length becomes f', then:

1. f'=f
2.  f'<f
3.  f'>f
4.  The information is insufficient to predict

Subtopic:  Reflection at Spherical Surface |
 69%
From NCERT
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A 4.5 cm needle is placed 12 cm away from a convex mirror of focal length 15 cm. What is the magnification?

1. 0.5

2. 0.56

3. 0.45

4. 0.15

Subtopic:  Reflection at Spherical Surface |
 68%
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A concave mirror gives an image three times as large as the object placed at a distance of 20 cm from it. For the image to be real, the focal length should be:

1. 10 cm 2. 15 cm
3. 20 cm 4. 30 cm
Subtopic:  Reflection at Spherical Surface |
 60%
From NCERT
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A convex mirror of focal length f forms an image which is \(1 \over n\) times the length of the object. The distance of the object from the mirror is:

1. (n-1)f

2. \(({n-1 \over n})f\)

3. \(({n+1 \over n})f\)

4. (n+1)f

Subtopic:  Reflection at Spherical Surface |
 60%
From NCERT
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A thin rod of length f/3 lies along the axis of a concave mirror of focal length f. One end of its magnified, real image touches an end of the rod. The length of the image is:

1. f

2. 12f

3. 2f

4. 14f

Subtopic:  Reflection at Spherical Surface |
 58%
From NCERT
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A rod of length 10 cm lies along the principal axis of a concave mirror of focal length 10 cm in such a way that its end closer to the pole is 20 cm away from the mirror. The length of the image is:

1. 10 cm 2. 15 cm
3. 2.5 cm 4. 5 cm
Subtopic:  Reflection at Spherical Surface |
 59%
From NCERT
NEET - 2012
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The distance between the object and its real image formed by a concave mirror is minimum when the distance of the object from the centre of curvature of the mirror is: [f  focal length of the mirror]

1.  Zero

2.  f2

3.  f

4.  2f

Subtopic:  Reflection at Spherical Surface |
 57%
From NCERT
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