Which of the following has the shortest wavelength?
A. Infrared
B. Ultraviolet
C. X-rays
D. Gamma rays
Answer: Option D
Solution (By JKSSB Mock Tests)
Gamma rays have wavelengths < 10⁻¹² m, shortest in EM spectrum. X-rays 10⁻¹⁰-10⁻⁸ m. UV 10⁻⁸-4×10⁻⁷ m. IR longer. So gamma rays shortest. Highest frequency, energy.
Explanation:
Momentum (p) is defined as the product of mass (m) and velocity (v). p = m × v. The SI unit of mass is the kilogram (kg) and the SI unit of velocity is meters per second (m/s or m s⁻¹). Therefore, the SI unit of momentum is kg m/s or kg m s⁻¹.
No comments yet. Be the first to start the discussion!