Diameter mesurment of capylery tube by trvaling microsope with reading
Answers
A travel microscope
A travel microscope is used to determine the short distance for the accuracy of 0.001 cm. Measurement theory is based on the theory of vernier. In a normal travel microscope, the main scale division consists of a 0.05 cm (0.5 mm) magnitude and the Vernier Scale has 50 divisions. Less than 0.05 / 50 = 0.001 cm
Determination of diameter
To determine the diameter of capillary with horizontal direction
Mount capillary tube in horizontal direction in a stand to keep capillary tube with the help of a rubber cork. Rotate the microscope so that it is horizontal and with the tip of the capillary tube.
Now, looking at the microscope, turn the focusing screw on to get a clear image of the capillary tube. Now adjust the microscope in such a way that the vertical crosswheme corresponds to the left end of the capillary tube.
Read it
On the horizontal scale, look at the zero of the veriner, and find the main-scale partition before the zero mark. Note this as MSR.
Now look carefully at the vernier None of the fifty lines will come along with one of the main scale lines. On Vernier he is reading the division vernier scale. Note this in the overview table.
Now take the telescope horizontally to focus on the right edge of the capillary tube. Take it again as before reading.
Repeat the telescope with upper and lower horizontal crosswires over and over again and the reading is now taken on a vertical scale.
With observations, you get two values of diameter, one for vertical and one for horizontal.
Comments
Travel Microscope = ...... C low count