## What happens when light passes through a diffraction grating?

The diffraction grating separates light into colors as the light passes through the many fine slits of the grating. This is a transmission grating. The prism separates light into colors because each color passes through the prism at a different speed and angle.

## What is an effect that diffraction causes?

Diffraction in the atmosphere by small particles can cause a bright ring to be visible around a bright light source like the sun or the moon. A shadow of a solid object, using light from a compact source, shows small fringes near its edges.

## What happens to wavelength after diffraction?

The wavelength is unchanged after diffraction. A gap width similar to the wavelength of the waves passing through causes a lot of spreading, eg sound waves passing through a doorway. A gap width much larger than the wavelength causes little spreading eg light waves passing through a doorway.

## What can be observed when white light is used in a diffraction experiment?

There are two such first order diffracted beams, one on each side of the straight-through beam. In these diffracted beams, the colors are separated due to diffraction. So for a white light (such as from a flashlight), you will see a rainbow.

## Can diffraction be produced with white light?

The reason that diffraction effects are able to split white light into its different colors is because white light is composed of an incoherent combination of many different wavelengths of light. Additionally, since the light is incoherent, you don’t see dark and bright spots like you would with monochromatic light.

## How shall a diffraction pattern change when white light is used instead of monochromatic light?

Explanation: When white light is used instead of monochromatic light in Fraunhofer Diffraction, then the central maximum remains white as all seven wavelengths meet there in the same phase. The diffraction pattern does not change.

## What happens if white light is used in place of monochromatic light?

When we use white light in place of monochromatic light then only central fringe looks white and other fringes of different colour are observed. It is becaused central fringe for all the colours are formed at central point so it becomes white after mixiing up.

## What happens if we use white light instead of laser?

A laser is used because it is a convenient source of a narrow beam of light. It has the added advantage that it produces light of a single wavelength; white light would produce a similar effect but the diffraction pattern would not be as wide as different wavelengths (colours) would interfere at different points.

## What is the difference between white light and monochromatic light?

Monochromatic means that all of the light produced by the laser is of a single wavelength. White light is a combination of all visible wavelengths (400 – 700 nm). Coherent means that the waves of light are in phase with each other. A light bulb produces many wavelengths, making it incoherent.

## What will happen if we use white light instead of sodium light?

Answer. You can’t. The Michelson Morley experiment requires measuring the position of interference fringes. With white light they would all overlap and you wouldn’t be able to determine the location of individual fringes.

## Why sodium light is used in Newton ring?

(i) The Newton’s ring experiment can be also used to find the wavelength of a monochromatic light. In this case, the radius of curvature of the convex surface of the given lens is supplied or is determined otherwise. By employing sodium light whose mean wavelength is 5893Å, R can be determined from Eqn.

## What will be the Newton’s ring pattern if we use white light?

When viewed with white light, it forms a concentric ring pattern of rainbow colors, because the different wavelengths of light interfere at different thicknesses of the air layer between the surfaces.

## What will be the effect of using white light in place of sodium light in the Young’s double slit experiment?

In Young’s double slit experiment, if white light is used in place of monochromatic light, then the central fringe is white and some coloured fringes around the central frings are formed. Since βred>βvio≤t etc., the bright fringe of violet colour forms first and that of the red forms later.

## Why is monochromatic light used in the double slit experiment what would happen if white light were used?

If a white light is used in the double slit experiment, the different colours will be split up on the viewing screen according to their wavelengths. The violet end of the spectrum (with the shortest wavelengths) is closer to the central fringe, with the other colours being further away in order.

## What will happen if white light is used in why DSC?

Assertion: If white light is used in place of monochromatic light in YDSE, then central point is white, although at other places coloured fringes will be obtained. Reason: At centre, path difference is zero for all wavelengths. Hence, all wavelengths will interfere constructively.

## Is an LED a coherent light source?

Unlike laser light, LED is not coherent. LED is an incoherent light source. In physics, coherent means two waves having the same frequency, they have the same waveform and have a constant phase difference.

## What is a diffraction grating used for?

Diffraction grating, component of optical devices consisting of a surface ruled with close, equidistant, and parallel lines for the purpose of resolving light into spectra.

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