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Q. Why does the sky appear blue in colour?
As-per to the Rayleigh's scattering law the shorter wavelengths are scattered much more than the longer wavelengths. The blue look of sky is due to scattering of sunlight by the atmosphere. Blue light is scattered to a bigger extent than red light.
This scattered radiation results the sky to appear blue.
A circular hole of radius r at the bottom of an initially full water container is sealed by a ball of mass m and radius R (>r). The depth of the water is now slowly decr
Q. State the law of conservation of electric charges? The entirety charge in an isolated system always remains constant. For instance Uranium ( 92 U 238 ) can decay by emittin
METALLIC BOND: When positive metallic ions are surrounded by a sea of negative electrons, the solid being held together by electrostatic forces then it is called metallic
D=(a÷Sqrt(h**k**l**))
Triangle of force Two or more forces can be added or subtracted to produce a Resultant Force . If two forces are equal but act in opposite directions, then obviously they can
What is the hardness of water? How is it expressed? Hardness is the property of water which stops lather formation with soap. This is because of the presence of certain salts o
how Michelson interferometer can be used to measure the wavelength of sodium light.
A body has a weight W kg on the surface of earth. What will be its weight on the surface of moon in gravitational units of force and SI units? Ans) mass of body=W/g At moon w
Give the conditions needed for production and observation of interference pattern?
A certain radioactive substance has a half-life of 40 minutes. How much of an original 100 grams substance will remain after 2 hours? solution) m= m0/2t/T m=100 gms.. t=2 hours
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