A photon has a wavelength of 200 nm. What is its frequency? (c = 3.0 × 10⁸ m s⁻¹)
ν = c/λ = 1.5×10¹⁵ Hz.
Ref: NCERT Class 11 Chemistry > Chapter 2: Structure of Atom > Topic: Atomic Models - Thomson Rutherford and Bohr Model
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