Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
MHT CET Medical202622 April 2026Evening ShiftChemistryStructure of AtomActual

Visible light has a wavelength of 700 nm. Calculate its frequency in hertz.

Options

  1. A7.451 10¹⁴ Hz
  2. B3.502 10¹⁴ Hz
  3. C4.286 10¹⁴ Hz
  4. D4.882 10¹⁴ Hz

Correct answer

C. 4.286 10¹⁴ Hz

Step-by-step solution

Given wavelength = 700 nm = 700 10⁻⁹ m . Speed of light c = 3 10^8 m/s . Using the relation c = , the frequency is given by: = c = 3 10^8 700 10⁻⁹ = 3 7 10¹⁵ = 4.286 10¹⁴ Hz Answer: 4.286 10¹⁴ Hz

Practice Structure of Atom on Quantrex Academy →

More from Structure of Atom

Identify the pair of atoms of elements as isotones from the following. 2026Which of the following elements has an electronic configuration, [ Ar ] 4s^2 ? 2026Calculate the energy per mole of photons of red light with a wavelength 750 nm. [ h = 6.626 10⁻³⁴ Js, C = 3 10^8 m/s.] 2026Calculate the energy associated with an electron in the first orbit of hydrogen atom? 2026Find the wave number of the 4^ th line in the Lyman series of H spectrum. (R = Rydberg constant) 2026Calculate the de-Broglie wavelength of an electron having velocity 1000 ms ⁻¹ [ h = 6.626 10⁻³⁴ js , mass of an electron = 9.1 10⁻³¹ kg ] 2026How many total number of s and p electrons are respectively present in Cl ^- ? 2026Calculate the wavelength, wavenumber of photon having its energy 8.0 10⁻¹⁹ J . [h = 6.626 10⁻³⁴ J s , C = 3.0 10^8 m s ⁻¹] 2026 Full Structure of Atom list All MHT CET Medical PYQs