Which of the following electromagnetic wave has least wavelength?
(A) Gamma rays
(B) X- rays
(C) Radio waves
(D) microwaves
1 Answers
Talk Doctor Online in Bissoy App
Electromagnetic radioation with maximum wavelength is
Its (B) Radiowave
2 Answers 1 views
Electromagnetic wave travels with a speed of …………….
C) 3 x 108 m/s
2 Answers 1 views
The relation between frequency and wavelength of electromagnetic wave
Correct option is C) λ ∝ 1/υ
2 Answers 1 views
The colour in the sequence VIBGYOR that has least wavelength is …………….
Correct option is D) violet
2 Answers 1 views
12 In a plane electromagnetic wave, the directions of electric field and magnetic field are represented by \( \hat{ k } \) and \( 2 \hat{ i }-2 \hat{ j } \), respectively. What is the unit vector along direction of propagation of the wave? (a) \( \frac{1}{\sqrt{2}}(\hat{ i }+\hat{ j }) \) (b) \( \frac{1}{\sqrt{2}}(\hat{ j }+\hat{ k }) \) (c) \( \frac{1}{\sqrt{5}}(\hat{ i }+2 \hat{ j }) \) (d) \( \frac{1}{\sqrt{5}}(2 \hat{ i }+\hat{ j }) \)
Correct answer is (a) We know that propagation wave vector ∵ \(\vec{E} = \hat{k}\) \(\vec{B} = 2\hat{i} - 2\hat{j}\) \(\vec{C} = \vec{E} \times \vec{B}\) \(\vec{C} = \begin{vmatrix} \hat{i} & \hat{j} & \hat{k} \\ 0 & 0 & 1...
2 Answers 1 views
Which of the following colour of white light has least Wavelength ?
Correct option is B) Violet
2 Answers 1 views
State different units used for wavelength of electromagnetic waves.
1. The SI unit of wavelength of electromagnetic waves is metre (m). 2. Small wavelengths are represented by micrometre (µm), angstrom (Å), nanometre (nm) etc. [Note: l A = 1010 m = 10-8 cm, 1...
2 Answers 1 views
Which of the following electromagnetic waves have the longest wavelength?
Correct option is: (C) radio waves
2 Answers 1 views
the electric field vector in an electromagnetic wave travelling in free space has amplitude 120N/C.determine electrostatic energy density and the amplitude of the magnett field vector.
Some one please give this answer
2 Answers 1 views