Answer:
[tex]1.99\cdot 10^{-25} J[/tex]
Explanation:
Electromagnetic waves are oscillations of the electric and the magnetic field in a plane perpendicular to the direction of motion the wave.
All electromagnetic waves travel in a vacuum always at the same speed, the speed of light:
[tex]c=3.0\cdot 10^8 m/s[/tex]
The energy of an electromagnetic wave is given by the equation:
[tex]E=\frac{hc}{\lambda}[/tex]
where:
[tex]h=6.63\cdot 10^{-34}Js[/tex] is the Planck constant
[tex]c=3.0\cdot 10^8 m/s[/tex] is the speed of light
[tex]\lambda[/tex] is the wavelength of the wave
In this problem, we have a wave with wavelength of
[tex]\lambda=1 m[/tex]
So, its energy is:
[tex]E=\frac{(6.63\cdot 10^{-34})(3.0\cdot 10^8)}{1}=1.99\cdot 10^{-25} J[/tex]
