Electromagnetic Waves - Result Question 19

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19. The frequency of electromagnetic wave, which is best suited to observe a particle of radius $3 \times 10^{-4} cm$ is of the order of

======= ####19. The frequency of electromagnetic wave, which is best suited to observe a particle of radius $3 \times 10^{-4} cm$ is of the order of

3e0f7ab6f6a50373c3f2dbda6ca2533482a77bed:content/english/neet-pyq-chapterwise/physics/electromagnetic-waves/electromagnetic-waves—result-question-19.md (a) $10^{15}$

(b) $10^{14}$

(c) $10^{13}$

(d) $10^{12}$

[1991]

Topic 2: Electromagnetic Spectrum

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Answer:

Correct Answer: 19. (b)

Solution:

  1. (b) Size of particle $=\lambda=\frac{c}{v}$

$3 \times 10^{-6}=\frac{3 \times 10^{8}}{v}$

$v=10^{14} Hz$

When frequency is higher than this, wavelength is still smaller. Resolution becomes better.