Advertisements
Advertisements
प्रश्न
Define metre in terms of the wavelength of light.
Advertisements
उत्तर
One metre is defined as 1,650,763.73 times the wavelength of a specified orange-red spectral line in emission spectrum of Krypton = 86.
OR
One metre is defined as 1,553,164.1 times the wavelength of the red line in the emission spectrum of cadmium.
APPEARS IN
संबंधित प्रश्न
The least count of a vernier callipers is 0.01 cm and it has an error of + 0.07 cm. While measuring the radius of a sphere, the main scale reading is 2.90 cm and the 5th vernier scale division coincides with the main scale. Calculate the correct radius.
Define the term least count as applied to a vernier callipers.
Which part of vernier callipers is used to measure the external diameter of a cylinder?
Figure shows a screw gauge in which circular scale has 200 divisions. Calculate the least count and radius of the wire.
What do you understand by the following term as applied to screw gauge?
Positive zero error
State whether the following statement is true or false by writing T/F against it.
The ratchet of a screw gauge is used to measure the depth of a beaker.
State whether true or false. If false, correct the statement.
With the help of vernier caliper we can have an accuracy of 0.1 mm and with screw gauge we can have an accuracy of 0.01 mm.
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.
