The angle of incidence at which the angle of refraction is 900 is called
Total internal reflection
critical angle
Angle of reflection
Angle of incidence
An ordinary mirror silvered at the back forms several images of one object,due to
Multiple reflection inside the glass.
Reflection
Diffuse reflection
The perpendicular to the mirror at the point where the incident ray strikes is called
Reflected ray
Incident ray
Normal
Refracted ray
The reciprocal of focal length is called the
Principal focus of the lens
Power of the lens
Magnification of the image
Length of the object
The bending of light when it passes from one medium to another is called
Refraction
Our eye has a converging lens which 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
What happens when a parallel beam of light fall on a plane mirror or on a perfectly polished surface?
Regular reflection occurs
Diffuse reflection occurs
Total internal reflection occurs
Refraction occurs
Which act as the reflecting surface in an ordinary mirror?
Glass
Mirror
Silver at the back of the glass
All the above
When a ray of light enters an optically denser medium it
Bend towards the normal
Bend away from the normal
Pass parallel to the normal
Never bends
When sunlight falls on a triangular glass prism
A spectrum is obtained
Dispersion takes place
The prism separates the white light into many colours
All are true
