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प्रश्न
The wavelength of light is 589 nm. what is its wavelength in Å?
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उत्तर
Wavelength of light = 589 nm
1 angstrom = 0.1 nm
We have 589 nm
`589/0.1 = 5890` Angstroms
= 5890Å
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संबंधित प्रश्न
A vernier callipers has a zero error of + 0.06 cm. Draw a neat labelled diagram to represent it.
The pitch of a screw gauge is 1 mm and the circular scale has 100 divisions. In measurement of the diameter of a wire, the main scale reads 2 mm and 45th mark on the circular scale coincides with the base line. Find
(i) The least count and
(ii) The diameter of the wire.
Define metre according to the old definition.
What do you understand by the term zero error?
The thimble of a screw gauge has 50 divisions for one rotation. The spindle advances 1 mm when the screw is turned through two rotations.
- What is the pitch of the screw?
- What is the least count of screw gauge?
- When the screw gauge is used to measure the diameter of wire the reading on the sleeve is found to be 0.5 mm and reading on thimble is found, 27 divisions. What is the diameter of the wire in centimetres?
How will you find the Zero Error of Vernier Caliper? Explain.
On a vernier calliper, 25 vernier scale divisions are equal in length to 24 main scale divisions. One main scale division is 1 mm. Find the least count of the instrument.
