When the distance between the object and the plane mirror increases:
the image remains same
the size of the image will become less than the size of the object
the distance between the image and the plane mirror increases
the distance between the image and the plane mirror decreases
The angle of incidence is
the angle that the incident ray makes with the mirror
the angle that the incident ray makes with the normal at the point of incidence
180° minus the angle that the incident ray makes with the mirror
the angle that the incident ray makes with the reflected ray
A person cannot see the distant objects clearly(though he can see the nearby objects clearly). He is suffering from the defect of vision called:
hypermetropia
myopia
night blindness
cataract
In a periscope, the reflecting mirrors will be:
Perpendicular to each other
Parallel to each other
At an angle of 45°
At an angle of 60°
The outer layer of the eye is called:
Cornea
Sclerotic
Choroid
Retina
The commonly used unit for wavelength of light is
Angstrom
Metre
Light year
None of these
The persistence of the eye is only for:
1/10th of a second
1/12th of a second
1/16th of a second
1/20th of a second
The Braille code used by blind people use dots patterns for words. How many dot patterns or characters are used in this code?
52
63
48
26
The part which protects the human eye is called:
Chroid
Blind spot
In our house, we uses which type of mirror to look at ourselves ?
Convex mirror
Concave mirror
Convex lens
Plane mirror
