Final answer:
The energy of a photon with a frequency of 1.05 x 10^16 Hz is 6.9573 × 10^-18 J.
Step-by-step explanation:
The energy of a quantum or photon can be calculated using the equation E = hf, where E is the energy, h is Planck's constant (6.626 × 10^-34 J·s), and f is the frequency of the photon. To find the energy of a photon with a frequency of 1.05 x 10^16 Hz, we can substitute the values into the equation:
E = (6.626 × 10^-34 J·s)(1.05 x 10^16 Hz) = 6.9573 × 10^-18 J
Therefore, the correct answer is A) 6.9573 × 10^-18 J.