Light

Mirrors having a curved reflecting surface are caleed as-
1. plane mirrors
2. spherical mirrors
3. simple mirrors
4. none of the above
The spherical mirror with a spherical surface curved inward is called-
1. convex mirror
2. concave mirror
3. curved mirror
4. none of the above
The center of which the reflecting surface of a spherical mirror is a part is called-
1. pole
2. centre of curvature
3. cradius of curvature
4. aperture
The spherical mirror used as a rear view mirror in the vehicles is-
1. concave mirror
2. convex mirror
3. plane mirror
4. none of the above
The imaginary line passing through the centre of curvature of a spherical mirror is called-
1. centre of curvature
2. pole
3. principal axis
4. radius curvature
The distance from the pole to the focus is called-
1. pole length
2. focal length
3. principal axis
4. none of the above
Focal length is eqaul to half of the
1. centre of curvature
2. axis
3. radius of curvature
4. none of the above
If the focal length of a spherical mirror is 10cm, what is the value of its radius of curvature?
1. 10cm
2. 5cm
3. 20cm
4. 15cm
If the image and object distance is same then the object is placed at
1. infinity
2. at F
3. between f and P
4. at C
The refractive index of water is-
1. 1.0
2. 1.33
3. 1.44
4. 1.52