Advertisements
Advertisements
Question
Why is the metre length in terms of the wavelength of light considered more accurate?
Advertisements
Solution
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
RELATED QUESTIONS
The wavelength of light is 589 nm. what is its wavelength in Å?
Name the part of the vernier callipers which is used to measure the following
External diameter of a tube
When does a vernier callipers has the positive error?
A micrometre screw gauge has a negative zero error of 7 divisions. While measuring the diameter of a wire the reading on the main scale is 2 divisions and 79th circular scale division coincides with baseline.
If the number of divisions on the main scale is 10 to a centimetre and circular scale has 100 divisions, calculate
- pitch
- observed diameter
- least count
- corrected diameter.
What is the least count in the case of the following instrument?
Screw gauge
Least count of a vernier caliper is ______ cm.
The precision of vernier calipers is ______ mm.
How will you find the Zero Error of Vernier Caliper? Explain.
