Chapter 15: Problem 2166
The frequency \(1057 \mathrm{MHz}\) of radiation arising from two close energy levels in hydrogen belongs to (A) radio waves (B) infrared waves (C) micro waves (D) \gamma rays
Chapter 15: Problem 2166
The frequency \(1057 \mathrm{MHz}\) of radiation arising from two close energy levels in hydrogen belongs to (A) radio waves (B) infrared waves (C) micro waves (D) \gamma rays
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Get started for freeAccording to Maxwell, a changing electric field produces (A) emf (B) Electric current (C) magnetic field (D) radiation pressure
An electromagnetic wave going through vacuum is described by $E=E_{0} \sin (k x-\cot )$. Which of the following is independent of the wavelength? (A) \(\omega\) (B) \((\mathrm{k} / \mathrm{c})\) (C) \(\mathrm{k}_{\mathfrak{e}}\) (D) \(\mathrm{k}\)
The maximum value of \(\mathrm{E}^{-}\) in an electromagnetic waves in air is equal to \(6.0 \times 10^{-4} \mathrm{Vm}^{-1}\). The maximum value of \(\mathrm{B}^{-}\) is (A) \(1.8 \times 10^{5} \mathrm{~T}\) (B) \(2.0 \times 10^{4} \mathrm{~T}\) (C) \(2.0 \times 10^{-12} \mathrm{~T}\) (D) \(1.8 \times 10^{13} \mathrm{~T}\)
The frequency of light wave of wavelength \(5000 \mathrm{~A}\) is \(\mathrm{Hz}\) (A) \(6 \times 10^{14}\) (B) \(1.5 \times 10^{-2}\) (C) \(1.5\) (D) \(6 \times 10^{1}\)
The rms value of the electric field of the light coming from the sun is $720 \mathrm{~N} / \mathrm{c}$. The average total energy density of the electromagnetic wave is (A) \(4.58 \times 10^{-6} \mathrm{Jm}^{-3}\) (B) \(6.3 \times 10^{-9} \mathrm{Jm}^{-3}\) (C) \(81.35 \times 10^{-12} \mathrm{Jm}^{-3}\) (D) \(3.3 \times 10^{-3} \mathrm{Jm}^{-3}\)
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