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q what is a frame of reference a system of co-ordinate axes which describe the position of a particle in two or three dimensional space is called a
q what are the limitations of electron microscopean electron microscope is operated merely in high vacuum this prohibits the utilize of the
concerning events during the periods of life how dissimilar is the gametogenesis in women and in menthe formation of spermatogonia in men takes place
q why x-rays are not used in microscopes 1 the wavelength of x-rays is slighter than that of the visible light2 x-rays cant be focussed as visible
what is the difference between spermatids and sperm cells what is the name of the transformation of spermatids into sperm cellssperm cells the male
q what are the uses of an electron microscopeuses of electron microscope i it is utilized in the industry to study the surface of metals structure of
q an electron beam is accelerated through a potential difference of 104 volt find the de broglie wavelength lambda 1227 a o radicvlambda 1227 a o
q what are de broglie waves matter in motion should be accompanied by waves called de broglie wavesde broglie wavelength lambda h
q give three applications of photoelectric cells i photoelectric cells are utilized for reproducing sound in cinematographyii they are utilized for
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
what is the difference between spermatocyte i and spermatocyte iithe spermatocyte i 2n undergoes the primary division of meiosis meiosis i
what is the difference between spermatogonium and spermatocyte ithe male germ cells are the spermatogonia diploid cells 2n located in the testicles
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
indicating the name and respective ploidy of each involved cell how can the formation of sperm cells from germ cells be describedthe formation of
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