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प्रश्न
The Wavelength of a particular colour is 5400Å. Express it in nanometer and metre.
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उत्तर
1Å=10-1 nm
So, 5400 Å= 5400 X 10-1 = 540 nm
1Å=10-10 m
So, 5400 Å= 5400 X 10-10= 5.4X 10-7 m
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संबंधित प्रश्न
Draw a neat and labelled diagram of a screw gauge.
Name its main parts and state their functions.
A vernier callipers has its main scale graduated in mm and 10 divisions on its vernier scale are equal in length to 9 mm. When the two jaws are in contact, the zero of the vernier scale is ahead of the zero of the main scale and the 3rd division of the vernier
scale coincides with a main scale division.
Find : (i) The least count and
(ii) The zero error of the vernier callipers.
Fig., below shows the reading obtained while measuring the diameter of a wire with a screw gauge. The screw advances by 1 division on the main scale when circular head is rotated once.
Find:
(i) Pitch of the screw gauge,
(ii) Least count of the screw gauge and
(iii) The diameter of the wire.
What do you understand by the term zero error?
When does a vernier callipers has the positive error?
State the correction if the negative error is 7 divisions when the least count is 0.01 cm.
What do you understand by the term least count of screw?
State whether the following statement is true or false by writing T/F against it.
The diameter of a wire can be measured more accurately by using vernier calipers than by a screw gauge.
What is the least count in the case of the following instrument?
Stopwatch
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.
