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 reciprocal of focal length is called the
Principal focus of the lens
Power of the lens
Magnification of the image
Length of the object
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
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
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
The perpendicular to the mirror at the point where the incident ray strikes is called
Reflected ray
Incident ray
Normal
Refracted ray
Short sightedness can be corrected by using a
Diverging spectacle lens
Converging spectacle lens
Concave mirror
Convex mirror
The average adult can focus object comfortably from about
25 cm to 1 m
25 cm to infinity
25 cm to 5 m
5 cm to infinity
Long sightedness can be corrected by using a
An ordinary mirror silvered at the back forms several images of one object,due to
Multiple reflection inside the glass.
Reflection
Diffuse reflection
