This is called “secondary wavefront”.

If the plane wavefronts are being reflected on the plane mirror, the shape of the wavefront of the reflected light is again planar. Your IP: 184.107.112.52 No one dared to challenge Newton’s corpuscular theory until Christopher Huygens proposed his wave theory of light in the early 18th century. Depending on the shape of the source of light, wavefronts can be of three types.

The effect of non-uniform energy distribution in the medium as a result of two light waves being superimposed is called interference.

Thus, the section of optics that deals with the behavior of light and its wave characteristics is said to be wave optics.

Thus, the section of optics that deals with the behavior of light and its wave characteristics is said to be wave optics. • All the points are equidistant from the source.

Light waves — that is, electromagnetic waves — behave like other waves: They can reflect, refract (bend), and interfere with each other. According to Huygens’s theory, light consists of waves that travel through a very dilute and highly elastic material medium present everywhere in space”.

Sir Isaac Newton stands as a prominent figure that supported the voice of particle nature of light, who proposed a corpuscular theory which states that “light consists of extremely light and tiny particles known as corpuscles which travel with very high speeds from the source of light to create a sensation of vision by reflecting on the retina of the eye”. These secondary wavelets spread out in all directions with the velocity of the wave.

As the medium is supposed to be very dilute and highly elastic, its density would be very low and modulus of elasticity would be very high so that the speed of the light would be very large. A surface touching these secondary wavelets tangentially in the forward direction at any instant (Δt)\left( \Delta t \right)(Δt) gives the position and shape of the new wavefront at the instant. Also, it is equivalent to the product of energy density and wave speed. As discussed in the introduction Huygen’s principle of secondary wavelets could explain many optical phenomena like reflection, refraction, interference, and diffraction, but it could not explain why wavefronts of secondary wavelets are formed in the forward direction and not in the backward direction. In this case, Amplitude of light waves, A∝1rA\propto \frac{1}{\sqrt{r}}A∝r​1​, Intensity of light waves I∝1rI\propto \frac{1}{r}I∝r1​. Here are some wave formulas that are useful when you’re working with optics. If a plane wavefront falls on a concave mirror, the shape of the reflected light is spherical. It is known as the bending of waves around an obstacle’s end or through an aperture into the geometrical shadow of the obstacle. As the wave must be perpendicular to the wavefront, it will make an angle of 60∘60{}^\circ60∘ with the x-axis. We will learn about the concept of wave optics for IIT JEE in detail here. The concept of wavefronts for reflection and refraction is explained below. Solved Examples. Problem 1: Calculate the intensity of a wave whose power is 25 KW and the area of cross-section is 35×10 6 m 2? Wave optics also called Physic optics deals with the study of various phenomena such as polarization, diffraction, interference and other occurrences where ray approximation of geometric optics cannot be done.

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