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The Concave mirror - u-v method
The Concave mirror - u-v method
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1)
What is the relation between focal length(f) and radius of curvature(R) of a concave mirror?
Both a and c
f = R/2
R = 2f
f = 2R
2)
What is the nature of image when the object is placed between the pole and the focus of a concave mirror?
Real - inverted
Imaginary - inverted
None of these
Virtual - erect
3)
Which of the following is a situation which uses spherical mirrors?
Magnifying glasses
Satellite dishes
All of of these
Rear view mirrors in vehicles
4)
Choose the incorrect statement from the following?
Real inverted image with same size is obtained if the object is placed on the centre of curvature of a concave mirror.
The image formed in concave mirror is always real.
The mirror equation is one which connects u, v, and f.
Concave mirrors have reflecting inner surface.
5)
Name the imaginary line passing through the pole and centre of curvature of a spherical mirror.
Principal axis
Radius of curvature
Aperture
Focal length
6)
What is the nature of the focus of a concave mirror?
Real
None of these
Real or virtual
Virtual
7)
What is the radius of curvature of a plane mirror?
Depends on the size of the mirror.
∞
1
0
8)
A concave mirror of focal length 15 cm creates a real image 45 cm away from its principal axis. The corresponding object is located how far from the mirror?
2.25 m
22.1 cm
2.25 cm
22.5 cm
9)
Which of the following best describes the image when an object is placed 20 cm in front of a concave mirror of focal length 10 cm?
Real inverted diminished image
None of these
Real inverted image of same size
Virtual erect enlarged image
10)
If a man’s face is 20 cm in front of concave shaving mirror creating an upright image 2 times as large as the object, what is the focal length of the mirror?
-45 cm
-40 cm
40 cm
40.5 cm