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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) A vernier scale has 10 divisions. It slides over the main scale, whose pitch is 1.0 mm. If the number of divisions on the left hand of zero of the vernier scale on the main scale is 56 and the 8th vernier scale division coincides with the main scale, calculate the length in centimetres.
(b) If the above instrument has a negative error of 0.07 cm, calculate the corrected length.
The circular scale of a screw gauge has 50 divisions. Its spindle moves by 2 mm on the sleeve, when given four complete rotations calculate
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A micrometre screw gauge having a positive zero error of 5 divisions is used to measure diameter of a wire, when reading on the main scale is 3rd division and the 48th circular scale division coincides with baseline. If the micrometer has 10 divisions to a centimetre on the main scale and 100 divisions on a circular scale, calculate
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- What is the pitch of the screw?
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- 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?
Name the measuring employed to measure the diameter of a needle.
What is the least count in the case of the following instrument?
vernier calipers
What is the least count in the case of the following instrument?
Thermometer
A vernier caliper using the scale invented by Galileo.
