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Q. What is fluorescence?
When an atomic or else molecular system is excited into higher energy state by absorption of energy it returns back to lower energy state in a time less than 10-5 second and the system is found to glow brightly by emitting radiation of longer wavelength. While ultra violet light is incident on certain substances they emit visible light. This phenomenon is entitled as fluorescence.
Assignment Just question and answer Quotation; how much
how to get the formula ?.
Q. A small pin fixed on a table top is viewed from above from a distance of 50 cm. By what distance would the pin appear to be raised if it is viewed from the same point through a
Determine about the rod in magnetic coil the rod is placed in a magnetic coil deliver alternating current, the rod suffers a change within length for each half cycle of alterna
Isn't there any relation to calculate the dipole moment from the electronegativities of the participating atoms? Solution) formulae:- 16(X A -X B )+3.5(X A -X B ) 2
illustrate the parts and function of motor
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The merry-go-round described in the previous problem is pushed with a constant force of 53 N. What is the angular acceleration?
Which of the following particles has more electrons than neutrons: (1) C (2) F- (3)O -2 (4)Al +3 Ans: O -2
Q. How greatly does sea salt weigh per cubic foot? Answer:- Sodium chloride NaCl weighs 72 lb/ft 3 .
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