Spherometer Experiment Viva Questions and Answers
(i) What is the principle of a spherometer?
Ans: It works on the principle of a micrometer screw.
(ii) Why is the spectrometer called so?
Ans: Since it is used to measure the radius of curvature of a spherical surface, it is known as spectrometer.
(iii) How will you calculate the least count of a spherometer?
Ans: LC = Pitch/No. of head scale divisions.
(iv) Is there any zero correction for a spectrometer?
Ans: No
(v). What is the principle of a spherometer?
Principle of micrometer screw.
(vi). Mention the uses of a spherometer.
a. To measure the thickness of small glass pieces
b. To find the radius of curvature of spherical surfaces.
(vii). Why is spherometer called so?
Since it is used to measure the radius of curvature of spherical surfaces, it is named as spherometer.
(viii). Mention the precautions to be taken.
a. The parallax should be removed tip to tip.
b. The head screw should always be turned in the direction only while taking reading to avoid back-lash error.
(ix). What are the sources of error?
a. The parallax may not be removed tip to tip.
b. The apparatus may have back-lash error.