![The electric field of an electromagnetic wave in vacuum is given by](https://www.gkseries.com/blog/wp-content/uploads/2023/09/The-electric-field-of-an-electromagnetic-wave-in-vacuum-is-given-by.jpg)
Q. The electric field of an electromagnetic wave in vacuum is given by
![](https://www.gkseries.com/blog/wp-content/uploads/2023/09/Screenshot-760.png)
The wave is reflected from the 𝑧 = 0 surface. If the pressure exerted on the surface is 𝛼𝜖0𝐸20, the value of 𝛼 (rounded off to one decimal place) is
Ans: 0.8
Sol:
![](https://www.gkseries.com/blog/wp-content/uploads/2023/09/Screenshot-761.png)
![](https://www.gkseries.com/blog/wp-content/uploads/2023/09/Screenshot-762.png)
Q. The electric field of an electromagnetic wave in vacuum is given by
The wave is reflected from the 𝑧 = 0 surface. If the pressure exerted on the surface is 𝛼𝜖0𝐸20, the value of 𝛼 (rounded off to one decimal place) is
Ans: 0.8
Sol:
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