LIGHT

The light ray ,which strikes any surface is called as
1. Reflected ray
2. Incident ray
3. Refracted ray
4. Angle of reflection
The ray that comes back from the surface after refelction is known as
1. Incident ray
2. Angle reflection
3. Reflected ray
4. Refracted ray
The line at an angle of $90 °$ to the the mirror at the point where the incident ray strikes the mirror as shown in the follwoing fig. This line is known as
1. Right angle
2. Angle reflection
3. Normal
4. Angle of incidence
The angle between normal and incident ray is called as
1. Angle of incidence
2. Angle of reflection
3. Normal
4. Right angle
The angle between the normal and the reflected ray is known as
1. Angle of incidence
2. Normal
3. Angle of reflection
4. Right angle
One of the laws if reflection states that
1. Angle of incidence is always more than the angle of reflection
2. Angle of incidence is always less than the angle of reflection
3. Angle of incidence is not equal to the angle of reflection
4. Angle of incidence is always equal to the angle of reflection
When an image is formed on the mirror left of the object appears to be on right and vice versa this because
1. Diffused reflection
2. Lateral inversion
3. Regular reflection
4. Lateral reflection
Splitting of lights into its colours is known as
1. Reflection
2. Refraction
3. Incidence
4. Dispersion
Function of the iris is
1. Controls the amount of light entering into the eye
2. Protects eye from foreign objects
3. Reflects the light
4. Sends signal to the brain
Two kinds of nerve cell present in the eye are
1. Rods and cones
2. Retina
3. Pupil
4. Iris
Which of the following statements is true with respect to Light ?
1. Reflected light can not be reflected again
2. Reflected light can be reflected again
3. Reflected light is not much of importance with respect to light
4. Reflected light and incident light are same
When light falls on the smooth surface like that of a mirror then such reflection is known as
1. Regular reflection
2. Irregular reflection
3. Diffused reflection
4. Lateral inversion
Choose the correct image which represents regular reflection
4. None of these
Periscopes are used in _____ by the soldiers to see the things outside.
1. submarines and bunkers
2. Submarines and cars
3. Submarines and aeroplane
4. Submarines and train
Which of the following instrument can be used to explain the concept of multiple images?
1. Binocular
2. Lens
3. Telescope
4. Kaleidoscope
The object which emit their own light are known as
1. Incandescent objects
2. Shining objects
3. Luminous objeccts
4. Bright objects
Which of the following statements is true ?
1. Cones and rods are sensitive to dim light and bright light respectively.
2. Cones and rods are sensitive to bright light and dim light respectively.
3. Cones and rods both are sensitive to bright light.
4. Cones and rods both are sensitive to dim light.
What is the distance at which one can read with a normal eye ?
1. 10cm
2. 30cm
3. 25cm
4. 35cm
Tactual aid includes
1. Tape recorder
2. Braille and stylus
3. Spectacles
4. Calculators
How many dot patterns or characters are there in Braille system?
1. 68
2. 61
3. 63
4. 64
If the angle of incidence is $20 °$ then what will be the angle of reflection?
1. $20 °$
2. $30 °$
3. $15 °$
4. $10 °$
Beautiful patterns are formed in the kaleidoscope ,which is due to
1. Lateral inversion
2. Coloured objects in the kaleidoscope
3. multiple reflection
4. Sunlight
Sunlight is called as white light,which consists of how many colours ?
1. 9
2. 10
3. 8
4. 7
Which of the following statement is true ?
1. The impression of an image persists on the retina for about 1/20 th of a second .
2. The impression of an image persists on the retina for about 1/16 th of a second .
3. The impression of an image persists on the retina for about 1/30 th of a second .
4. The impression of an image persists on the retina for about 1/15 th of a second .

LIGHT

Quiz