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Class 12 NEET Physics Electromagnetic Waves Questions
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Question : 48
Total: 50
The frequency of electromagnetic wave, which best suited to observe a particle of radius
3
×
10
−
4
c
m
is of the order of
(1991)
10
15
10
14
10
13
10
12
Validate
Solution:
The wave length of radiation used should be less than the size of the particle
Size of particle
=
l
=
c
υ
3
×
10
−
4
=
3
×
10
10
υ
or
υ
=
10
14
hertz
However, when frequency is higher than this, wavelength is still smaller. Resolution becomes better.
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