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q name the types of photoelectric cellsthe photo electric cells are of three kindsa photo emissive cellb photo voltaic cell andc photo conductive
q state any three laws of photo electric emissioni for a specified photo sensitive material there is a minimum frequency called the threshold
q what is dual character of light light behaves as particles of energy in the higher energy region as well as as waves in the lower energy
q define threshold frequency the minimum frequency of incident radiation lower which the photoelectric emission isnt possible completely but high the
q what is cut-off or stopping potential the minimum negative retarding potential specified to the anode for which the photo electric current becomes
q what is photoelectric effectphotoelectric release is the phenomena by which a good number of substances chiefly metals emit electrons under the
q a beam of electrons travelling with a speed of 4 x 107 ms-1 is projected normal to a magnetic field of b 10-3 wb m-2 what is the path of the beam
q what is maser give the principle of it 1 the term maser for microwave amplification through stimulated emission of radiation2 the working of maser
q give the applications of moseleys law i the elements are organized in the periodic table according to the atomic numbers and not according to the
q give the drawbacks of sommerfeldrsquos atom modeldrawbacks of sommerfelds atom model i it couldnt explain the distribution and arrangement of
q what are stark and zeeman effects it is found that while electric or magnetic field is applied to the atom all of the spectral line split into
q what is fine structure of spectral lines when the spectral line of hydrogen atom is observed by spectrometers having high resolving power it is
q what is excitation potential energy of an atom the energy required to increase an atom from its normal state into an excited state is called
q the minimum wavelength of x-rays produced in a coolidge tube is 005 nm find the operating voltage of the coolidge tube lambdamin 12400 a0 v 05 x
q find the minimum wavelength of x-rays produced by an x-ray tube operating at 1000 kvlambdamin 12400 a0 vtherefore lambdamin 12400 x 10-10 10 6
q explain any one of the drawbacks of rutherford atom model as-per to the classical electromagnetic theory the accelerating electron must radiate
q write any three applications of laser in industry industrial applications i the laser beam is utilized to drill extremely fine holes in diamonds
q write any three medical applications of lasermedical applications i in medicine micro surgery has befall possible due to narrow angular spread of
q write down two important facts of laue experiment on x-ray diffraction the laue experiment has established subsequent two important facts1 x-rays
what is hologram holography when an entity is photographed by a camera a two dimensional image of three dimensional objects is obtained a three
q how much should be the voltage of an x-ray tube so that the electrons emitted from the cathode may give an x-ray of wavelength 1 ao after striking
q what is ionisation potential energy for hydrogen atom the energy necessary to remove an electron from first orbit to its outermost orbit ninfin is
q define ionisation potentialthe ionisation potential is that increase speed potential which makes the impinging electron acquires sufficient energy
q state moseleys lawthe frequency of the spectral line in the qualities x-ray spectrum is directly proportional to the square of the atomic number z
q what are the characteristics of laser beam characteristics of laser the laser beam a is monochromatic b is coherent with the waves all exactly in