refraction and reflection

In the previous chapter we have seen how light gets reflected when it is incident on a surface. Now let us see what happens when a ray of light travelling in one medium enters another medium of different optical density. It is a matter of common experience that a spoon placed in a gl..

Wave motion is the propagation of a disturbance produced in a medium by the repeated periodic motion of the particles of the medium. It is only the energy of the disturbance that moves forward without any mass transfer. In an elastic medium, the frequency and the amplitude of oscillation of..

(i) Reflected light travels in the same medium (air) as the incident light. Hence, speed of reflected light c = 3 x 10 8 ms - 1 . The wavelength ( l ) of reflected light is 600 nm. The frequency f is (ii) The refracted rays are in water. Therefore, speed..

Characteristics of Light - Light is a form of energy produced by luminous objects. Light can travel through vacuum. Light can penetrate through transparent materials but cannot pass through opaque objects. Light travels in a straight line in an optically homogeneous medium. Light bounces back when ..

Dual Nature of Matter and Radiation - Light has been regarded as waves to explain the phenomena of reflection, refraction, diffraction etc. However in 1905, Albert Einstein suggested that light has a dual character, which means, it can behave as a particle as well as a wave. It ..

Take points 1,2,3 on the given wavefront AB. The distance traveled by light in t secs will be 'ct' where c is the velocity of light. With point 1 as centre and ct as radius, draw a sphere as shown (dotted circles). Repeat for points 2 and 3 and so on. Now draw a surface A 1 B 1 and A 2 B 2 such tha..

In an Earth environment, electromagnetic waves propagate in ways that depend not only on their own properties but also on those of the environment itself. Since the various methods of propagation depend largely on frequency therefore the complete electromagnetic spectrum is now shown for reference..

One of the most complicated optical devices is the human eye. Let us see the construction of the human eye and then the mechanism of image formation. Human eye is spherical in shape and diameter of about 2.5cm. Sclerotic is a tough, opaque and white substance forming the outermost coating of the ye..

>, on the other hand, is coated so as to be slightly "leaky," so that a small fraction of the laser light can escape at each reflection to form the useful beam. The windows W, W in the above figure, which close the ends of the discharge tube, are slanted so that their normals make an angl..

Total internal reflection is a phenomenon of reflection of light on traveling from a denser medium to a rarer medium. Two essential conditions for the phenomenon of total internal reflection are: - Light should travel from a denser to a rarer medium. - Angle of inciden..