Third law: The incident ray & reflected ray lie on the opposite sides to that of normal.Second law: The angle of reflection is always equal to the angle of incidence.First law: The incident ray, reflected ray and normal lies in the same plane.The laws of reflection for any mirror are as given below: Reflection of light- Bending of light un same medium is called reflection. When a ray of light incident on a reflecting surface of medium, the light will be sent back into the same medium is called as reflection of light. Thus it has been proved that light has been proved that light has dual nature i.e. But later on according to quantum mechanics it will proved that light has particle nature also. There are many phenomenon related to light such as interference, polarization which all explains the wave nature of light. Later this explained the phenomenon of diffraction. The light having rectilinear property of propagation get bended around the edges of an opaque bodies like wood, bricks, stones etc. Beside this we can see how the images are formed using mirrors in detail. This chapter includes the optical phenomenon like reflection, refraction which explains the rectilinear propagation of light & also wave nature of light. Particle nature follows rectilinear propagation of light. In this chapter we consider particle nature of light. According to the above definition we consider light as a wave but light has particle nature also. Light: light is an electromagnetic wave which gives sensation of vision. In short, “Ray of light is the radiant energy which produces sensation of light traveling in a straight line.” Before proceeding to this concept we define light first. The ray of light coming from the sun always travels in a straight line path which we called as rectilinear propagation of light. the blue color of sky, rainbow, mirror images, beautiful colors of wings of butterfly all are the wonders of light. There are many phenomenon happening in the environment which explains the wonders of light like reflection, refraction, scattering, dispersion etc. The various colors of different objects is due to the light of different wavelengths reflected by them. How do we see objects? When light is incident on any object then that object reflects the light which is incident on the retina of our eyes and an image of that object will form& finally we get visualization of that object. Optics: The branch of physics dealing with the study of light is called optics. ![]() If there is no source of light then there will be no visualization. All the credit of our visualization goes to light. ![]() The science is developing rapidly and we are facing the real magic of science in daily life. Hundred decades ago, there were televisions which are black and white in color only even though that time we saw the colorful world with our eyes. What will happen if we thought that, we can’t see the world of colors through our eyes? It is impossible to think the things like that.
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