When sunlight is incident on water at an angle of `53^(@)`, the reflected light is found to be completely plane-polarised. Determine (i) angle of refraction of light and (ii) refractive index of water.
1 Answers
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What is is plane polarised light ? Two polaroids are placed at `90^(@)` to each other and the transmitted intensity is zero. What happens when one mor
Correct Answer - Refere to `NCERT`
2 Answers 2 views
When light of wavelength 400nm is incident on the cathode of photocell, the stopping potential recorded is 6V. If the wavelength of the incident light
Correct Answer - 4.97 V
2 Answers 7 views
White light is incident on a soap film at an angle of `sin^(-1(4)/(5))` and the reflected light on examination by the spectroscope shows dark bands. T
Correct Answer - `1.716xx10^(-3)`cm
2 Answers 10 views
A soap film of refractive index 4/3 and thickness `1.5xx10^(-4)`cm is illuminated by white light incident at angle `45^(@)`. The reflected light is ex
Correct Answer - n=7
2 Answers 2 views
The intensity of a light- beam is 10 `Wm^(-2)` and it is plane-polarised in vertical direction. It passes through a polaroid whose transmission axis i
Correct Answer - (i) 1.875 `Wm^(-2)` (ii) zero
2 Answers 1 views
A ray of light is incident on a glass plate of refractive index 1.54. If the reflected ray is completely plane polarised, find (i) angle of incidence
Correct Answer - (i) `57^(@)` (ii) `33^(@)` (iii) `40.5 ^(@)`
2 Answers 1 views
A beam of light travelling in water falls on a glass plate immersed in water. When the incident angle is `51^(@)`, the reflected beam of light is foun
Correct Answer - 1.647
2 Answers 1 views
Plane polarised light is inciden on a piece of quartz cut parallel to the axis Find the least thickness for which the O and E-rays suffer a phase chan
Correct Answer - `1.37xx10^(-5)m`
2 Answers 1 views
rays of light strike a horizontal plane mirror at an angle of `45^(@)`. At what angle should be a second plane mirror be placed in order that the refl
Correct Answer - Second mirror should be inclined to the horizontal at angle of `67.5^(@)`
2 Answers 1 views
A ray of light is incident on the glass prism at an angle of `40^(@)`. Find the angle of emergence, if the angle of prism is `60^(@)` and refractive i
Correct Answer - `58.5^(@)`
2 Answers 1 views