The letter box as mentioned above is to be painted at the rate of Rs. 1000 per m^2 . If the slot made in top surface is of dimensions (to insert the letters ) 10cm × 1cm , find out the amount required for painting the letter box.
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Answer:
The phenomenon of ejection of electrons from the surface of a metal when light of suitable frequency strikes on it, is called photoelectric effect. The emitted electrons are called photoelectrons.”10-Aug-2016
Answer:
The phenomenon of ejection of electrons from the surface of a metal when light of suitable frequency strikes on it, is called photoelectric effect. The emitted electrons are called photoelectrons.”10-Aug-2016
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What is photoelectric effect?