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- 1. Multiple Choice
The muscular diaphragm that controls the size of the pupil is
Cornea
Ciliary muscles
Iris
Retina
- 2. Multiple Choice
The image formed on the retina of the human eye is
virtual and erect
real and erect
real and inverted
virtual and inverted
- 3. Multiple Choice
When white light enters a prism, it gets split into its constituent colours. This is due to
different refractive index for different wavelength of each colour
each colours has same velocity in the prism.
prism material have high density.
Scattering of light
- 4. Multiple Choice
The air layer of atmosphere whose temperature is less then the hot layer behave as optically
denser medium
rarer medium
inactive medium
either denser or rarer medium
- 5. Multiple Choice
The deflection of light by minute particles and molecules of the atmosphere in all direction is called ____________ of light.
scattering
interference
tyndell effect
Reflection
- 6. Multiple Choice
At noon the sun appears white as [NCERT Exemplar Problems]
light is least scattered
all the colours of the white light are scattered away
blue colour is scattered the most
red colour is scattered the most
- 7. Multiple Choice
The danger signals installed at the top of tall buildings are red in colour. These can be easily seen from a distance because among all other colours, the red light
moves fastest in air
is absorbed the most by smoke or fog
is scattered the least by smoke or fog
is scattered the most by smoke or fog
- 8. Multiple Choice
When light rays enter the eye, most of the refraction occurs at the
Pupil
Iris
outer surface of the cornea
crystalline lens
- 9. Multiple Choice
In human eye,image is formed on
Iris
Cornea
Retina
Lens
- 10. Multiple Choice
Scattering of light by colloidal solution is known as
Scattering
Dispersion
Tyndall effect
Stability
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