The wavelength of a spectral line of caesium is $460 \ nm$. What is the frequency of the spectral line?
- A$4.5 \times 10^8 \ Hz$
- B$6.5 \times 10^{14} \ Hz$
- C$3 \times 10^9 \ Hz$
- D$5.6 \times 10^{14} \ Hz$
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Identify the correct statements from the following:
$I$) Isotopes of an element show different chemical behaviour
$II$) Lyman series of lines of hydrogen spectrum appear in $UV$ region
$III$) The oscillating electric and magnetic field components of electromagnetic radiation are perpendicular to each other and both are perpendicular to the direction of propagation of radiation
$I$) Isotopes of an element show different chemical behaviour
$II$) Lyman series of lines of hydrogen spectrum appear in $UV$ region
$III$) The oscillating electric and magnetic field components of electromagnetic radiation are perpendicular to each other and both are perpendicular to the direction of propagation of radiation
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