The lens in human eye is :
Concave lens
Convex lens
Bi concave lens
Bi convex lens
Stem and prongs are the parts of :
Violin
Tuning fork
Sitar
Sonometer
For total internal reflection :
i > c
i = c
i < c
i ≤ c
Light ray which strikes the surface is called :
Normal
Incident ray
Reflected ray
both 1 and 2
The comfortable distance up to which the normal eye can read is :
25 cm
20 cm
5 cm
10 cm
Which will we get maximum number of images?
Mirrors are placed parallel
Mirrors are placed perpendicular
Mirrors are placed at an angle 45o
Mirrors are placed at an angle 30o
The human ear has how many parts?
4
5
3
2
Dogs have the ability to hear the sound of range :
higher than 10kHz
lower than 10kHz
higher than 20kHz
lower than 20kHz
The loudness of the sound depends upon :
Amplitude
Frequency
Time period
Velocity
The voice box of human being is called :
Pharynx
Vocal box
Larynx
Vocal chord
