The correct option is A-1, B-3, C-2, D-4
Explanation
The International System of Units (SI) provides standard units for measuring physical quantities. In wave mechanics and kinematics, specific units are assigned to properties such as frequency, wavelength, time, and speed based on their fundamental definitions.Detailed Analysis:
- A. Frequency: Frequency is defined as the number of oscillations or cycles per unit of time. Its SI unit is Hertz (Hz), which represents one cycle per second. (Matches with 1)
- B. Wavelength: Wavelength is the spatial distance between consecutive corresponding points of the same phase on a wave, such as two adjacent crests or troughs. Being a measure of length, its SI unit is the Metre (m). (Matches with 3)
- C. Time Period: The time period is the duration required to complete one full cycle of oscillation or vibration. As a fundamental quantity of time, its SI unit is the Second (s). (Matches with 2)
- D. Speed: Speed is defined as the distance travelled per unit of time. It is a derived quantity calculated as distance divided by time. Its SI unit is Metre per second (m/s). (Matches with 4)
Conclusion: The correct matching is A-1, B-3, C-2, D-4.
Key Takeaway: Frequency (Hz) and Time Period (s) are inverse quantities ($f = 1/T$), while Speed (m/s) is the product of Frequency and Wavelength ($v = f \lambda$).