# A light year is the distance light travels in one year . How many meters are there in one light year?

The speed of light in vacuum is 3 x 10^8 m/s. That means in one second it travels 300000000 metres. As we know, in one year, there are 365 days; in each day there are 4 hours; in each hour there are 60 minutes and in each minute there are 60 seconds. Therefore, the distance [...]

# Dimensions of angle, specific heat, heat, latent heat, frequency, charge, potential difference, resistance.

What are the dimensions of angle,specific heat,heat,latent heat,frequency,charge,potential difference,resistance? Angle does not have any dimension as it is a pure ratio Dimensions of Specific heat  = [M0L2T-2K-1] Heat has the same dimensional formula as that of energy [ML2T-2] Latent heat is the heat energy required to convert unit mass of a substance from one state … Continue reading Dimensions of angle, specific heat, heat, latent heat, frequency, charge, potential difference, resistance.

# Physics Practical:: Measurement of diameter of capillary tube using travelling microscope.

Shalini asked: How to do calculation in the physics practical(capillary rise method)..how to measure the diameter of the capillary tube? A Travelling Microscope A travelling microscope is used to determine small distance to an accuracy of 0.001 cm. The measurement principle is based on the principle of vernier. In a typical travelling microscope, the main … Continue reading Physics Practical:: Measurement of diameter of capillary tube using travelling microscope.