![]() : a theory in physics: light is transmitted from luminous bodies to the eye and other objects by an undulatory movement. ![]() In his formulation of electromagnetism, Maxwell described light as a propagating wave of electric and magnetic fields. This situation dramatically changed in the 1860s when the Scottish physicist James Clerk Maxwell, in a watershed theoretical treatment, unified the fields of electricity, magnetism, and optics. Who proposed electromagnetic theory of light? In 1678, Huygens proposed that every point to which a luminous disturbance reaches becomes a source of a spherical wave the sum of these secondary waves determines the form of the wave at any subsequent time. The new wavefront is formed by drawing a line tangent to all the wavelets. Huygens principle states that each point of a wavefront is the source of secondary wavelets (small waves) which spread in all directions with the speed of the wave. … Instead, when the wavelets impact the surface of the second medium, they are reflected according to their arrival angles, but with each wave turned back to front, producing a reversed image. Reflection, according to Huygens, could also be explained through the concept of wavelets. How does Huygens principle explain reflection? That’s almost 400 years ago! Scientists have been trying to learn more about Saturn’s rings ever since. He spotted them while looking into space through a telescope in 1610. Who discovered Saturn rings?Īn astronomer named Galileo was the first person to see Saturn’s rings. Titan’s rotation period of about 16 days is synchronous to Saturn (meaning the same side always faces Saturn). It was discovered by Christiaan Huygens in 1655. Titan is the largest moon of Saturn, the second largest in the Solar System (after Ganymede of Jupiter). Huygens also invented the first pendulum clock, with an error of less than one minute a day.Īdvertisement Who first discovered Titan? He proposed that the an object’s center of gravity moves in a straight line, and calculated the formula for centrifugal force, the outward-pushing force on a rotating body. What is the contribution of Christiaan Huygens? Pendulums are used to regulate the movement of clocks because the interval of time for each complete oscillation, called the period, is constant. Pendulum, body suspended from a fixed point so that it can swing back and forth under the influence of gravity. In medieval Europe, purely mechanical clocks were developed after the invention of the bell-striking alarm, used to warn a man to toll the monastic bell. He realized that this property made the pendulum useful for timekeeping. ![]() His interest was sparked by his discovery that, at least for small swings, the pendulum is isochronous its period of swing is the same for different size swings. What inspired Galileo to invent the pendulum? ![]() When these waves carrying energy reach the eye, they excite the optic nerves and the sensation of vision is produced. What is wave Theory 10th?Īccording to wave theory of light, a source of light sends out disturbance in all directions. Huygens’ principle, in optics, a statement that all points of a wave front of light in a vacuum or transparent medium may be regarded as new sources of wavelets that expand in every direction at a rate depending on their velocities. The wave theory of light proposed by Christian Huygens has stood the test of time and today, it is considered the backbones of optics. Who proposed the wave theory of light Class 11? The double-slit experiment is a wonderfully simple experiment, which allowed Thomas Young to demonstrate convincingly the wave nature of light for the first time. Which experiment proved the wave theory of light? Then, in 1678, Dutch physicist Christian Huygens (1629 to 1695) established the wave theory of light and announced the Huygens’ principle. In a later volume, Huygens’ Principle, he ingeniously described how each point on a wave could produce its own wavelets, which then add together to form a wavefront. Huygens believed that ether vibrated in the same direction as light, and formed a wave itself as it carried the light waves.
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