Veto q&a 7 Month22 (1)

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Q Photoelectric effect was proposed by
Q&A
Bonus
A. Henrich Hertz
Q Photoelectric effect was explained by
A. Albert eienstein (1921)
Q Eienstein explained the Photo Electric Effect on the
basis of
A. Quantum theory
Q Quantum theory was put forward by
A. Max Planck
Q The light rays consist of small energy packets called
A. Quantum
Q The working principle of solar cells
A. Photoelectric effect
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Q & A Innovations
Who discovered that the light travels fastest in
vacuum
A. Leon Foucault
Who discovered that the speed of light varies
in different media
A. Leon Foucault
First accurate measurement of speed of light
A. Christian Romer
Who discovered white light consists a mixture
of 7 different colours
A. Isaac newton
Who proved light is an electro magnetic wave
A. Henrich Hertz
Who proved that there are 3 primary colours
A. Thomas Young
Q An object which reflects all colours appears as
A. white
Q An object which absorbs all colours appears as
A. Black
Q Snell’s Law is related with
A. Refraction
Q Fata morgana is a term associated with
A. Mirage
Q The measure of optical density of the medium is
A. refractive Index
Q Working Principle of Optical fibre
A. total Internal reflection
Q Dispersion was discovered by
A. Isaac newton
Q Device used for the splitting of composite beam of
white into its constituent colours
A. Prism
Q The father of fibre optics
A. Narendra Singh kapani
Q Working principle of binoculars, endoscopy
A. total Internal reflection
Q The splitting of light ray into different colours is called
A. Dispersion
Q Rainbow is seen as circle from
A. Space
Q Rainbow is seen as semi-circle from
A. Earth
Q Rainbow appears in the opposite direction of
A. Light
Q Angle of red colour in rainbow
A. 42.8 0
Q Angle of violet colour in rainbow
A. 40.8 0
Q Colour at the top of a rainbow
A. Red
Q Colour at the bottom of a rainbow
A. Violet
Q Colour at the centre of a rainbow
A. green
Q The phenomenon that occurs when two waves meet
while travelling along the same medium
A. Interference
Q Colours that appear on the upper layer of oil that
spread on road is due to
A. Interference
Q Interference was observed first by
A. Thomas Young
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