Answer:
Explanation:
The wavelengths are:
a. 632.8 nm (wavelength of red light from helium–neon laser)
b. 503 nm (wavelength of maximum solar radiation)
c. 0.052 nm (a wavelength contained in medical X-rays)
Energy of photon of electromagnetic waves is expressed as:
E = hf
h is the Planck constant
f is the frequency of radiation
since f = c/w
E = hc/w
c is the velocity of light = 3×10^8m/s
w is the wavelength
h = 6.63 × 10^-34J/Hz
If w = 632.8 nm
w = 632.8 × 10^-9m
E = (6.63 × 10^-34)(3×10^8)/6.328 × 10^-7m
E = 3.143×10^{-34+8+7}
E = 3.143×10^-19Joules
If w = 503 nm
w = 503×10^-9m
E = (6.63 × 10^-34)(3×10^8)/5.03× 10^-7m
E = 3.954×10^{-34+8+7}
E = 3.954×10^-19Joules
If w = 0.052 nm
w = 5.2×10^-11m
E = (6.63 × 10^-34)(3×10^8)/5.2× 10^-11m
E = 3.825×10^{-34+8+11}
E = 3.825×10^-15Joules
