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21. Amount of light entering into the camera depends upon (NTSE Delhi, Stage-I, 2014-15)
Focal length of objective lens
Product of focal length and diameter of objective lens
Distance of objective from camera
Aperture setting of the camera
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22. White colour of the cloud is due to (NTSE Delhi, Stage-I, 2014-15)
Reflection of seven colors of light
Refraction of seven colors of light
Scattering of seven colors of light
Absorption of seven colors of light
23. Colour of scattered light depends (NTSE Maharashtra, Stage-I, 2015-16)
Only on size of scattering particle
Only on length of travelling light
Both size of scattering particle and length of travelling light
On colour of incident light
24. The change in focal length of an eye lens is caused by the action of (NTSE Telangana, Stage-I, 2016-17) (NTSE Gujarat, Stage-I, 2016-17)
Pupil
Retina
Ciliary muscles
Iris
25. The rainbow is formed due to. (NTSE Jharkhand, Stage-I, 2016-17) (NTSE Chandigarh, Stage-I, 2016-17)
Refraction
Internal Reflection
Dispersion
All of these
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