Answer:
1.54 × 10^-24 J
Explanation:
- A microwave is an example of an electromagnetic wave which travels with the speed of light.
We are given;
The wavelength of microwave as 12.9 cm
But, 100 cm = 1 m
Therefore, the wavelength = 0.129 m
- To calculate the energy of the wave we use the formula, E = vh, where v is the frequency and h is the plank's constant, 6.626×10^-34 J-s
- But, v = c/λ, where λ is the wavelength and c is the speed of light, 2.998×10^8 m/s.
Therefore;
E =(c/λ)h
= (2.998×10^8 m/s÷0.129)×6.626×10^-34 J-s
= 1.54 × 10^-24 J
Therefore, the energy of one photon is 1.54 × 10^-24 J
