JEE Main 202125 JulyMorning Shift
- Exam
- JEE Main
- Year
- 2021
- Date
- 25 July
- Shift
- Morning Shift
- Subject
- Physics
- Chapter
- Electromagnetic Waves
JEE Main 2021 · 25 July · Morning Shift · Physics · Electromagnetic Waves
A linearly polarised electromagnetic wave in vacuum is E = 3 . 1...
A linearly polarised electromagnetic wave in vacuum is E = 3 . 1\cos \left[\left(1 . 8\right)z - \left(5 . 4 \times {10}^{6}\right)t\right]\overset{^}{i}N{C}^{- 1} is incident normally on a perfectly reflecting wall at . Choose the correct option.
Options
- AThe wavelength is .
- BThe frequency of electromagnetic wave is .
- CThe transmitted wave will be
3 . 1\cos \left[\left(1 . 8\right)z - \left(5 . 4 \times {10}^{6}\right)t\right]\overset{^}{i}N / C. - DThe reflected wave will be
3 . 1\cos \left[\left(1 . 8\right)z + \left(5 . 4 \times {10}^{6}\right)t\right]\overset{^}{i}N{C}^{- 1}.
Correct answer
D. The reflected wave will be
3 . 1\cos \left[\left(1 . 8\right)z + \left(5 . 4 \times {10}^{6}\right)t\right]\overset{^}{i}N{C}^{- 1}.
Step-by-step solution
Reflected wave will have direction opposite to incident wave.