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The wavelength of the first spectral line in the Balmer series of hydrogen atom is 6561 Å. The wavelength of the second spectral line in the Balmer series of single-ionized helium atom is - jee main 2012 physics 1 AnswerAn atom in its singlet state is subjected to a magnetic field. The Zeeman splitting of its 650 nm spectral line is 0.03 nm. The magnitude of the field is ________ Tesla (up to two decimal places). ( 𝑒=1.60×10−19 C, 𝑚𝑒=9.11×10−31 kg, 𝑐=3.0×108 ms–1)0 AnswerA hot plate of an electric oven connected to a 220 V line has two resistance coils A and B, each of 24 Ω resistance, which may be used separately, in series, or in parallel. What are the currents in the three cases? -CBSE Physics 1 AnswerA hydrogen atom initially in the ground state absorbs a photon which excites it to the n = 4 level. Estimate the frequency of the photon (Physics CBSE 2018)1 AnswerState Bohr’s postulate to define stable orbits in hydrogen atom. How does de Broglie’s hypothesis explain the stability of these orbits ? (Physics CBSE 2018) 1 AnswerA monochromatic light of wavelength 500 nm is incident normally on a single slit of width 0·2 mm to produce a diffraction pattern. Find the angular width of the central maximum obtained on the screen. (Physics CBSE 2018)1 AnswerF or a 4s orbital of hydrogen atom, the magnetic quantum number (ml) is1 AnswerWhat are spectral lines?1 AnswerUsing Bohr’s postulates show that for an electron revolving in the nth possible orbit in a hydrogen atom (a) the radius of the orbit is directly proportional to n^2, and (b) the total energy of the electron is inversely proportional to n^2. (Physics CBSE 2018)1 AnswerRephrase the sentence(GMAT) 1 AnswerThe intrinsic/permanent electric dipole moment in the ground state of hydrogen atom is (𝑎0 is the Bohr radius)1 Answer“So when we see ‘Red”, what we are actually seeing is that portion of the electromagnetic spectrum with a wavelength of about 0.0007 millimeters, in a situation where the other wavelengths are absent. It is our brains (and our language) which inform us it is “red”, and at the same time they often attach cultural labels that tell us it is powerful, or that it is the colour of love, or that it is a traffic sign which means we have to stop”.(NID-2018)1 AnswerDefine base line check line tie line and detail lne-Dec 20121 Answer Consider the following infinite series:-gate biotech 20151 AnswerIf number of electrons in an atom is 8 and number of protons is also 8, then (i) what is the atomic number of the atom? and (ii) what is the charge on the atom? CBSE- Class9- Chemistry 20131 AnswerAn atom is restricted to move in one dimension by making unit jumps either to the left or right, as shown in the figure. Assuming that a jump to the left or right is equally probable, the probability of the atom returning back to the starting point after four jumps is0 AnswerIn the following, a series of numbers/group of letters are given. One of them is left blank. Complete the series from the choice given below the questions. (NIFT UG)1 AnswerIn the following, a series of numbers/group of letters are given. One of them is left blank. Complete the series from the choice given below the questions. (NIFT UG)1 AnswerIn the following, a series of numbers/group of letters are given. One of them is left blank. Complete the series from the choice given below the questions. (NIFT UG)1 AnswerWrite the expression for the de Broglie wavelength associated with an electron accelerated through a potential V. (Physics CBSE 2018)1 Answer
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