A) X-rays
B) Ultraviolet rays
C) \[\gamma \]-rays
D) Cosmic rays
Correct Answer: D
Solution :
The wavelength order of waves are given below: Waves Wavelength (in \[\overset{\text{o}}{\mathop{\text{A}}}\,\]) X-rays 1 \[\overset{\text{o}}{\mathop{\text{A}}}\,\] to 100 \[\overset{\text{o}}{\mathop{\text{A}}}\,\] Ultraviolet rays 100 \[\overset{\text{o}}{\mathop{\text{A}}}\,\] to 4000 \[\overset{\text{o}}{\mathop{\text{A}}}\,\] \[\gamma\] -rays 0.001 \[\overset{\text{o}}{\mathop{\text{A}}}\,\] to 1 \[\overset{\text{o}}{\mathop{\text{A}}}\,\] Cosmic rays up to \[\text{4}\times \text{1}{{\text{0}}^{-3}}\overset{\text{o}}{\mathop{\text{A}}}\,\] Thus, Cosmic rays have the minimum wavelength.
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