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1. |
Calculate the energy of a photon of wavelength 6600 angstroms. |
A. | 0.3 × 10-19 J |
B. | 3 × 10-19 J |
C. | 30 × 10-19 J |
D. | 300 × 10-19 J |
Answer» C. 30 × 10-19 J | |