For what position of object, the image formed by a concave mirror is magnified and erect?
Object is at centre of curvature
Object is at focus
Object is in between principle focus and the pole
Object is at pole
When two mirrors are kept parallel to each other, Then the number of images formed is:
Zero
One
Infinite
Two
The incident ray and the reflected ray from a mirror are mutually perpendicular to each other. Then the angle of incidence.
90 °
100 °
80 °
45 °
The image formed by a plane mirror is:
erect and diminished
erect and enlarged
inverted and of same size
erect and of same size
At what distance from a concave mirror of focal length 25 cm should an object be placed so that the size of image is equal to the size of the object?
50 cm
75 cm
12.5 cm
20 cm
The radius of curvature of a convex mirror is 40 cm. Then the focal length is
80 cm
10 cm
_______ are used in construction of reflecting periscope.
Plane mirrors
Concave mirror
Concave lens
Convex mirror
By law of reflection
The return of light into the same medium after striking a surface is called
Refraction
Reflection
Transmission
Radiation
A man standing in front of a plane mirror, finds his image at a distance 6 m from himself. Then the distance of man from the mirror is:
3 m
6 m
12 m
2 m