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प्रश्न
The wavelength of light of a particular colour is 5800 Å.
Express it in nanometre.
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उत्तर
As we know, 1 nm = 10 Å
Given, Wavelength of light of particular colour = 5800 Å
Substituting the value of wavelength in the relation above, we get,
10 Å = 1 nm
1 Å = `1/10` nm
∴ 5800 Å = `1/10` × 5800 nm
∴ 5800 Å = 580 nm
Hence, wavelength of 5800 Å in nm = 580 nm.
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संबंधित प्रश्न
The wavelength of light of a particular colour is 5800 Å.
Express it in metre.
Name the part of the vernier callipers which is used to measure the following
External diameter of a tube
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.
Why is the metre length in terms of the wavelength of light considered more accurate?
A micrometre screw gauge has a positive zero error of 7 divisions, such that its main scale is marked in 1/2 mm and the circular scale has 100 divisions. The spindle of the screw advances by 1 division complete rotation.
If this screw gauge reading is 9 divisions on the main scale and 67 divisions on the circular scale for the diameter of a thin wire, calculate
- Pitch
- L.C.
- Observed diameter
- Corrected diameter
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?
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.
State whether the following statement is true or false by writing T/F against it.
A metre scale can measure a length of 6.346 cm.
An instrument that is used to measure the diameter of a cricket ball is ______.
