When a ray of light enters an optically denser medium it
Bent towards the normal
Bent away from the normal
Pass parallel to the normal
Never bends
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
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
Among the given refractive index which one is more denser ?
1.2
1.25
2.4
3
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
The centre of the lens is its
Principal axis
Principal focus
Optic centre .
Focal length.
At which condition total internal reflection takes place?
Angle of incidence > Critical angle
Angle of incidence = Critical angle
Angle of incidence < Critical angle
Angle of incidence = Angle of reflection.
The bending up of light when passing from one medium to another is known as
reflection
refraction
dispersion
none of these
The converging lens in our eye will form a
Real inverted image on the retina
Virtual inverted image on the retina
Virtual erect image on the retina
Real erect image on the retina
The image which can be produced on a screen is called
Virtual image
Real image
Laterally inverted image
Diminished image
