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CBSE Class 12 Physics 2017 Outside Delhi Set 1 Paper

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Question : 7 of 26
Marks: +1, -0
Identify the electromagnetic waves whose wavelengths vary as
(a) 10−12m<λ<10−8m10^{-12} \text{m} < \lambda < 10^{-8} \text{m}
(b) 10−3m<λ<10−1m10^{-3} \text{m} < \lambda < 10^{-1} \text{m}
Write one use for each.
Solution:  
(a) Identification
(b) Uses
(a) X-rays
Used for medical purposes.
(Also accept UV rays and gamma rays and any one use of the e.m. wave named)
(b) Microwaves
Used in radar systems.
(Also accept short radio waves and any one use of the e.m. wave named)
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