Chapter 15: Problem 2170
The wavelength of \(\mathrm{x}\) rays is of the order of (A) \(10^{-3} \mathrm{~m}\) (B) \(10^{-5} \mathrm{~m}\) (C) \(10^{-10} \mathrm{~m}\) (D) \(10^{-12} \mathrm{~m}\)
Chapter 15: Problem 2170
The wavelength of \(\mathrm{x}\) rays is of the order of (A) \(10^{-3} \mathrm{~m}\) (B) \(10^{-5} \mathrm{~m}\) (C) \(10^{-10} \mathrm{~m}\) (D) \(10^{-12} \mathrm{~m}\)
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Get started for freeWhich of the following electromagnetic wave has the least frequency? (A) radiowave (B) infrared radiation (C) microwave (D) x rays
A plane electromagnetic wave is incident on a material surface. If the wave delivers momentum \(p\) and energy \(E\), then (A) \(p=0, E=0\) (B) \(p \neq 0, E \neq 0\) (C) \(p \neq 0, E=0\) (D) \(p=0, E \neq 0\)
When a plane electromagnetic wave travels in vacuum, the average electric energy density is given by \(\left(E_{0}\right.\) is the amplitude of the electric field) (A) \((1 / 4) \varepsilon_{0} E_{0}^{2}\) (B) \((1 / 2) \varepsilon_{0} E_{0}^{2}\) (C) \(2 e_{\mathrm{o}} \mathrm{E}_{\mathrm{O}}^{2}\) (D) \(4 \varepsilon_{0} E_{0}^{2}\)
Range of frequency of microwaves is about (A) \(530 \mathrm{kHz}\) to \(1710 \mathrm{kHz}\) (B) \(54 \mathrm{MHz}\) to \(890 \mathrm{MHz}\) (C) \(3 \mathrm{GHz}\) to \(300 \mathrm{GHz}\) (D) \(4 \times 10^{14} \mathrm{~Hz}\) to \(7 \times 10^{14} \mathrm{~Hz}\)
If \(\lambda_{\gamma} \lambda_{\mathrm{x}}\) and \(\lambda_{\mathrm{m}}\) are the wave lengths of the \(\gamma\) -rays, \(\mathrm{x}\) rays and micro waves respectively in space then (A) \(\lambda_{\gamma}>\lambda_{\mathrm{x}}>\lambda_{\mathrm{m}}\) (B) \(\lambda_{\gamma}<\lambda_{\mathrm{x}}<\lambda_{\mathrm{m}}\) (C) \(\lambda_{r}=\lambda_{x}=\lambda_{m}\) (D) \(\lambda_{\gamma}<\lambda_{\mathrm{m}}<\lambda_{\mathrm{x}}\)
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