The energy of the photon in each case is;
1. 2.97 * 10^-27 J
2. 3.2 * 10^-19 J
3. 6.6 * 10^-19 J
4. 2.64 * 10^-29 J
5. 8.6 * 10^-19 J
The energy of a photon is obtained form the Plank's equation; E = hf
1) E = hf
E = 6.6 × 10^-34 J s * 4.5 × 10^6 Hz
E = 2.97 * 10^-27 J
2)E = hc/λ
E = 6.6 × 10^-34 J s * 3 * 10^8/615 * 10^-9
E = 3.2 * 10^-19 J
3) E = hc/λ
E = 6.6 × 10^-34 J s * 3 * 10^8/300 * 10^-9
E = 6.6 * 10^-19 J
4) E = hf
E = 6.6 × 10^-34 J s * 4 × 10^4 Hz
E = 2.64 * 10^-29 J
5) E = hc/λ
E = 6.6 × 10^-34 J s * 3 * 10^8/230 * 10^-9
E = 8.6 * 10^-19 J
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