Light

Which object use the reflection of light?
1. Kaleidoscope
2. plane mirror
3. convex mirror
4. all of these
Which surface will not reflect most of the light falling on them?
1. rough surface
2. smooth surface
3. shining surface
4. opaque surface
The ENT doctor uses a
1. plane mirror
2. concave mirror
3. convex mirror
4. convex lens
In dispersion, the colour of light that will bend more is_.
1. red
2. yellow
3. green
4. violet
Reflection by a looking mirror is called-
1. regular reflection
2. irregular reflection
3. regular and irregular reflection
4. none of these
The velocity of light in vacuum is 3*10^8 m/s and in glass is 2*10^8 m/s. The refractive index of glass is-
1. 2
2. 1.5
3. 1.8
4. 1.33
Incident angle of a ray of light is 30. The angle between the incident ray and the reflected ray is-
1. 50
2. 90
3. 60
4. 15
In the head lights of motor vehicle, _ mirrors are used as reflectors.
1. plane mirrors
2. concave lenses
3. convex mirrors
4. concave mirror
The phenomenon of light passing through the object is called-
1. reflection
2. refraction
3. dispersion
4. total internal reflection
The bouncing back of light from a surface is called-
1. refraction
2. total internal reflection
3. reflection
4. diffraction