KNOW PHYSICS

Light in Seventeenth century In seventeenth century, there were very less facilities for experiments. But the nature was nature, as it is now. Many major behaviors of light was known at that time- Light cast shadows . Which shows that light travels in straight line. Light is reflected from smooth surfaces. The rules of reflection are- (i) The incident ray, the reflected ray and the normal are in the same plane (ii) The angle of incidence is equal to the angle of reflection. When light is travelling from one medium to another medium, it bends unless it falls on the second medium normally. The rules of this phenomenon, called refraction , are: (i) The incident ray, the refracted ray and the normal are in the same plane  Light comes in different colours such as red, yellow, green, blue, violet, etc. All the scientist were trying to understand that why light shows these characteristic behaviors of straight line motion, reflection, refraction, colours, etc Newton's corpuscle theory...