What wavelength of radiation has photons of energy 2.87×x10−18 j?

The wavelength of radiation that has a photon of energy of 2.87 × 10-¹⁸J is 7.2 × 10-⁸nm

HOW TO CALCULATE WAVELENGTH:

E = hc/λ

Where;

λ = (6.626 × 10-³⁴ × 3 × 10⁸) ÷ 2.87 × 10-¹⁸

λ = 19.88 × 10-²⁶ ÷ 2.78 × 10-¹⁸

λ = 7.2 × 10-²⁶+¹⁸

λ = 7.2 × 10-⁸nm

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