The splitting up of light into its constituent colours is known as
Deviation
Dispersion
Reflection
Refraction
Light enters from air into a glass plate having refractive index 1.50. What is the speed of light in glass ?(The speed of light in vacuum is 3 x 108 m/s)
2 x 108 m/s
1.82 x108 m/s
4 x108 m/s
none of these
If a parallel beam of light falls on a plane mirror or on a perfectly polished surface.
Regular reflection occurs
Diffuse reflection occurs
Total internal reflection occurs
Refraction occurs
A diverging lens has
A real principal focus
A virtual principal focus
No principal focus
A principal focus same as a converging lens
The image which cannot be formed on a screen is called
Virtual image
Real image
Laterally inverted image
Diminished image
The centre of the lens is its
Principal axis
Principal focus
Optic centre .
Focal length.
Among the given refractive index which one is more denser ?
1.2
1.25
2.4
3
Linear magnification m is given by
m = height of the image / height of the object
m = height of the object / height of the image
Distance of the image from the lens / distance of the object from the lens.
m = Distance of the object from the lens / height of the image
the fatter ( more curved ) a converging lens is
The shorter its focal length and more it magnifies
The longer its focal length and more it magnifies
The longer its focal length and less it magnifies
The shorter its focal length and less it magnifies
Speed of light in a transparent solid is 2.10 x 108 m/s. Find its absolute refractive index?
1
2
1.43
2.43