Answer:
4.74 x 10-28 Joules
Explanation:
These are the options for the question
. These are the options for the question
.A 4.74 x 10-28 Joules
B. 4.74 x 10-19 Joules
C. 8.35 x 10-32 Joules
D. 2.79 x 10-40 Joules
The energy of the wave can be calculated using below expresion
E=hc/λ
Where h= Plank's constant
c= speed of light
(λ)= 4.2 x 10-7 m
h=6.626×10^-34kgm^2/s
c=2.998×10^8m/s
If we input the values in the formula above, we have
E= (6.626×10^-34×2.998×10^8)/4.2 x 10-7
E=1987.8×10-28/4.2 x 10-7
E=4.74 x 10-28 Joules
Therefore, the energy of the wave is
4.74 x 10-28 Joules
