Which of the following rays has the least wavelength ?
Correct answer: C. Cosmic rays
- A. Ultraviolet rays
- B. Infrared rays
- C. Cosmic rays
- D. X-rays
Explanation
Cosmic rays have extremely high energies and correspondingly very short wavelengths, shorter than ultraviolet, infrared, and X-rays. Infrared has the longest wavelength among these options.
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