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i ) Electrons in an atom revolve around the nucleus in circular orbits just as the planets revolve round the sun.ii) The electrons revolve only in certain permitted orbits called ‘stationary orbits' and do not radiate energy while in such orbits.iii) Whenever an electron jumps from one stationary orbit to another, absorption or emission of energy takes place. This theory could explain the spectral lines emitted by different elements.
A 5.0-cm-tall object is placed 16 cm from a convex lens with a focal length of 8.4 cm. What are the image height and orientation?
why we take large radius of curvature of lens
Reducing friction by an air stream Cut out a disc of cardboard about 10 cm in diameter. With a red-hot pin, burn a hole by the centre. Saw a small cotton reel in half and glue
The natural angular frequency of a S.H.O. of mass 2gm is 0.8rad/sec. It undergoes critically damped motion when taken to a viscous medium. Evaluate the damping force on the oscilla
It contains 35%- 90% nickels. Higher is the nickel content higher is the permeability and lower is the magnetic saturation of the alloy. MN, CO, and Mo can also be added in trace q
How to drive it?
A transformer takes a current of 0.8A when its primary is connected to a 240 volt, 50Hz supply, the secondary being on open circuit. If the power absorbed is 72 watts, Determi
The most probable radius (in pm) for finding the electron He + is: (1) 0.0 (2) 52.9 (3) 26.5 (4) 105.8 Ans: (c)26.5
What is the luminous flux of a flashlight that provides an luminance of 145 lx to the surface of water when held 0.50 m above the water?
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