# Physics

### How to Determine the Dimension and Magnitude of Young’s Modulus

A modulus of elasticity of the wire, called Young’s modulus (E), is defined as the ratio   It should be noted that Young’s modulus ,…

### Definition and Application of Hooke’s Law of Elasticity

In understanding Hooke’s law, we can advance an illustration: A bridge, when used by traffic during the day, is subjected to loads of varying magnitude….

### Concise Explanations of The Kinetic Theory of Saturation

The kinetic theory of saturation can best be explained when we consider a vapor in contact with its liquid, in an otherwise empty vessel which…

### Application of Fraunhofer Lines and Kirchoff’s Laws in Spectrum Analysis

Fraunhofer Lines: In 1814 Fraunhofer noticed that the sun’s spectrum was crossed by many hundreds of dark lines. These Fraunhofer lines, as they are called,…

### Room Reverberations, Acoustics and Sabine Investigations

A concert-hall, lecture-hall, or a broadcasting studio requires special design to be acoustically effective. The technical problems concerned were first investigated in 1906 by Sabine…

### The Production and Uses of Ultrasonics

What are Ultrasonics? Ultrasonics are sound waves of higher frequency than 20000 Hz, which are inaudible to a human being. These are known as ultrasonics; and…

### How to Measure the Velocity of Sound in Free Air Using Hebb’s Method

In 1905 Hebb carried out an accurate experiment to determine the velocity of sound in free air which used a method of interference. He carried out…

### How to Measure the Velocity of Sound in a Quincke Tube

Quincke devised a simple method of measuring the velocity of sound by obtaining permanent interference between two sound waves. He used a closed tube SAEB…

### Differences Between Infrared and Ultraviolet Radiations

The radiant energy which Herschel found beyond the red is now called infra-red radiation, because it is less refracted than the red. Radiant energy is…

### Observation of Reflection and Refraction with a Thermopile

What is a thermopile? A thermopile is a set of thermocouples that has been designed and arranged to measure little quantities of radiation or radiant…