The most comfortable distance at which one can read with a normal eye is about
25 cm
25 m
infinity
15 cm
The angle between an incident ray and the plane mirror is 300. The total angle between the incident ray and the reflected ray will be:
300
600
900
1200
The sun is seen before the actual sun rise because of
Reflection
Refraction
Scattering
Rectilinear propagation of light
Regular reflection takes place when surfaces are
rough
uneven
unpolished
smooth
The angle of reflection is equal to the angle of incidence:
always
sometimes
under special conditions
never
As the angle between two plane mirrors is decreased gradually, the number of images of an object placed between them:
increases gradually
decreases gradually
first increases then decreases
first decreases then increases
The nature of image formed on the retina of human eye is :
Virtual and erect
Virtual and inverted
Real and erect
Real and inverted
The outer layer of the eye is called:
Cornea
Sclerotic
Choroid
Retina
The image formed by a plane mirror is:
virtual and smaller
real and laterally inverted
real and the same size as that of the object
virtual and same size
Cataract is a condition of eye when :
Eyesight becomes foggy
Eye lens becomes cloudy
There is a loss of vision
All of the above
