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NEETPhysicsElectromagnetic Waves

Consider the following three electromagnetic waves: Microwaves ( M ), Infrared rays ( I ), and Ultraviolet rays ( U ). Which of the following represents the correct increasing order of their photon energies?

Options

  1. AE_M < E_I < E_U
  2. BE_U < E_I < E_M
  3. CE_I < E_M < E_U
  4. DE_M < E_U < E_I

Correct answer

A. E_M < E_I < E_U

Step-by-step solution

The energy of a photon is given by E = hc , where is the wavelength. The order of wavelengths for the given electromagnetic waves is: _ Ultraviolet Since photon energy is inversely proportional to wavelength, the order of their energies is: E_ Microwaves Thus, the correct increasing order is E_M Answer: E_M < E_I < E_U

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