Which of the following electromagnetic waves is least ene...
Which of the following electromagnetic waves is least energetic?
Infra-red rays
X-rays
Ultra-violet rays
Gamma rays
Correct answer is A
No explanation has been provided for this answer.
Which of the following statements about radioactivity is true? (i) Alpha particle is positively cha...
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If the kinetic energy of an electron is 100 eV, what is the wavelength of the de-Broglie wave associ...
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A galvanometer of internal resistance 50\(\Omega\) has a full scale deflection for a current of 5mA....
The lower and upper fixed points marked on a Mercury-in-glass thermometer are 210mm apart. The end o...
Water in an open container boils at a lower temperature when heated at the top of a mountain than at...
When blue and green colours of light are mixed, the resultant colour is ...
Which of the following statements about X-rays is not correct? They ...
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