# Physical Light

Light is electromagnetic radiation within a certain portion of the electromagnetic spectrum. .. Light exerts physical pressure on objects in its path, a phenomenon which can be deduced by Maxwell's equations, but can be more easily explained . The speed of light in a vacuum is a fundamental physical constant, the currently accepted value of which is exactly ,, metres per second, or about.

## CHARACTERISTICS OF LIGHT

Newton's contemporary Christiaan Huygens showed that a wave theory of light could explain the laws of reflection and refraction. In the late s, James Clerk Maxwell predicted, and then Gustav Ludwig Hertz verified, the existence of electromagnetic waves traveling at the speed. Some characteristics and properties of light are: 1: It moves in straight line called Rectilinear Propagation of light. 2: It is stream of Corpuscles.

### LIGHT SPECTRUM

Light spectrum is the many different wavelengths of energy produced by a light source. Light is measured in nanometers (nm). Each nanometer represents a. Light spectrum can mean the visible spectrum, the range of wavelengths of electromagnetic radiation which our eyes are sensitive to or it.

## 5 PROPERTIES OF LIGHT

Regular/Specular reflection – reflected rays go in one directions; happens in smooth and shiny surfaces; image can be seen; 5. Refraction Light. Light and its nature have caused a lot of ink to flow during these last decades. Its dual behavior is partly explained by (1)Double-slit experiment.

## WHAT IS LIGHT IN PHYSICS

Light is electromagnetic radiation within a certain portion of the electromagnetic spectrum. In physics, the term light sometimes refers to electromagnetic radiation of any wavelength, whether visible or not. In this sense, gamma rays, X- rays. Light is a transverse, electromagnetic wave that can be seen by the typical human. The wave nature of light was first illustrated through experiments on diffraction and interference. Like all electromagnetic waves, light can travel through a vacuum.

### BASIC PROPERTIES OF LIGHT

Direction of wave propagation is perpendicular to both electric and magnetic vectors. It shows the phenomena of reflection, refraction, diffraction and polarisation. What are some characteristics and properties of light?. 10 properties of light. 1. Properties of Light; 2. Properties of Light • • • • • • • • • Effects of Materials on Light Reflection Refraction Dispersion Total.