ICSE /Class 10
Physics MCQ Based On Using a triangular prism to produce a visible spectrum from white light electromagnetic spectrum
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ICSE Class 10 Physics Using a triangular prism to produce a visible spectrum from white light electromagnetic spectrum
Color's speed is minimized in a glass.
λ=c/f=(3×〖10〗^8)/(7.5× 〖10〗^14 )=4× 〖10〗^(-7) m 1nm=〖10〗^(-9) m ∴λ=400nm. 1A=〖10〗^(-10) m ∴ λ=4000A.
As the red light has the highest wavelength among all the colours, so it is scattered the least.
Roentgen discovered the x-rays.
The beam will pass parallel
As the red light has the highest wavelength among all the colours, so it is scattered the least. Due to which most of the light gets reflected back and only red can travel longer distances through rain, fog, dust etc. to reach our eyes effectively.
Intensity of scattered light I∝1/λ^4 .
Gamma rays, X –rays, Ultraviolet rays, Visible light, Infrared radiations, Microwaves, Radio waves is correct sequence.
Blue light is scattered in all directions by the tiny molecules of air in Earth's atmosphere. Blue is scattered more than other colors because it travels as shorter, smaller waves.
The atmospheric refraction is responsible for twinkling of stars. As the light from the stars enters the earth’s atmosphere it suffers refraction and cause the twinkling.
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