Advertisements
Advertisements
प्रश्न
Why is the metre length in terms of the wavelength of light considered more accurate?
Advertisements
उत्तर
Metre length in terms of the wavelength of light is considered more accurate because
- The wavelength of light does not change with time, temperature, pressure, etc.
- It can be reproduced anywhere at any time because Krypton is available everywhere.
APPEARS IN
संबंधित प्रश्न
The wavelength of light of a particular colour is 5800 Å.
Express it in nanometre.
The wavelength of light is 589 nm. what is its wavelength in Å?
Define the term 'Vernier constant'.
A pendulum completes 2 oscillations in 5 s. What is its time period? If g = 9.8 m s-2, find its length.
Figure shows the position of vernier scale while measuring the external length of a wooden cylinder.
- What is the length recorded by the main scale?
- Which reading of vernier scale coincides with the main scale?
- Calculate the length.
What do you understand by the following term as applied to micrometre screw gauge?
Baseline
Name the measuring employed to measure the thickness of a paper.
What is the least count in the case of the following instrument?
Metre scale
What is the least count in the case of the following instrument?
Spring balance
How will you find the Zero Error of Vernier Caliper? Explain.
