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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
The wavelength of light of a particular colour is 5800 Å.
Express it in nanometre.
Define the term 'Vernier constant'.
Draw a neat and labelled diagram of a screw gauge.
Name its main parts and state their functions.
Define metre in terms of the wavelength of light.
(a) A vernier scale has 20 divisions. It slides over the main scale, whose pitch is 0.5 mm. If the number of divisions on the left hand of the zero of vernier on the main scale is 38 and the 18th vernier scale division coincides with the main scale, calculate the diameter of the sphere, held in the jaws of vernier callipers.
(b) If the vernier has a negative error of 0.04 cm, calculate the corrected radius of the sphere.
State the formula for calculating length if:
The reading of the main scale is known and the number of vernier scale divisions coinciding with the main scale is known.
Name the measuring employed to measure the diameter of a pencil.
What is the least count in the case of the following instrument?
Screw gauge
