The greater the energy of a photon,the

  • A
    longer the wavelength and the higher the frequency
  • B
    longer the wavelength and the lower the frequency
  • C
    shorter the wavelength and the higher the frequency
  • D
    shorter the wavelength and the lower the frequency

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How is an electron observed? Explain.

Explain emission and absorption spectra.

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Alpha rays consist of a stream of

The number of the following statements which is/are incorrect is:
$A$. Line emission spectra are used to study the electronic structure.
$B$. The emission spectra of atoms in the gas phase show a continuous spread of wavelength from red to violet.
$C$. An absorption spectrum is like the photographic negative of an emission spectrum.
$D$. The element helium was discovered in the sun by spectroscopic method.

What is Maxwell's electromagnetic theory?

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