An object is placed from a concave mirror of focal length The image formed is ____.
real, inverted and same in size
real, inverted and smaller
virtual, erect and larger
virtual, erect and smaller
A virtual image three times the size of the object is obtained with a concave mirror of radius of curvature The distance of the object from the mirror is ____.
Radius of curvature of concave mirror is and the size of image is twice as that of object, then the object distance is ____.
All of the following statements are correct except ____.
the magnification produced by a convex mirror is always less than one
a virtual, erect, same-sized image can be obtained using a plane mirror
a virtual, erect, magnified image can be formed using a concave mirror
a real, inverted, same-sized image can be formed using a convex mirror
If an object is placed in front of a concave mirror of focal length the image is ____.
diminished, upright, virtual
enlarged, upright, virtual
diminished, inverted, real
enlarged, upright, real
Which of the following form(s) a virtual and erect image for all positions of the object?
convex lens
concave lens
convex mirror
concave mirror
An object tall is placed in front of a mirror. In order to produce an upright image of height one needs a ____.
A concave mirror gives an image three times as large as the object placed at a distance of from it. For the image to be real, the focal length should be ____.
The minimum distance between the object and its real image for concave mirror is ____.
f
2f
4f
Zero
An object is placed at from a convex mirror of focal length The image formed by the mirror is ____.
A point object is placed at a distance of and its real image is formed at a distance of from a concave mirror. If the object is moved by towards the mirror, the image will shift by about ____.
Under which of the following conditions will a convex mirror of focal length f produce an image that is erect, diminished and virtual?
Only when 2f > u > f
Only when u = f
Only when u < f
Always
The focal length of a convex mirror is 20 cm its radius of curvature is ____.
10 cm
20 cm
30 cm
40 cm
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 is ____.
22.5 cm
7.5 cm
30 cm
45 cm
A point object is placed at a distance of 30 cm from a convex mirror of focal length 30cm. The image will form at ____.
infinity
focus
pole
15 cm behind the mirror
An object 2.5 cm high is placed at a distance of 10 cm from a concave mirror of radius of curvature 30 cm The size of the image is ____.
9.2 cm
10.5 cm
5.6 cm
7.5 cm
An object of length 6 cm is placed on the principle axis of a concave mirror of focal length f at a distance of 4f. The length of the image is ____.
2 cm
12 cm
4 cm
1.2 cm
Convergence of concave mirror can be decreased by dipping in ____.
water
oil
both
None of the above
What is the height of image when an object of 2 mm is placed on the axis of a convex mirror at a distance 20 cm of radius of curvature 40 cm?
20 mm
10 mm
6 mm
1 mm
Image formed by a concave mirror of focal length 6 cm, is 3 times of the object, then the distance of object from mirror is ____.
– 4 cm
8 cm
6 cm
12 cm