difference between diffraction and refraction?

Answer 1

Diffraction is the bending of waves around the edge of an obstacle.
Diffraction takes place with sound; with electromagnetic radiation, such as light, X-rays, and gamma rays; and with very small moving particles such as atoms, neutrons, and electrons, which show wavelike properties.

Refraction is the deflection of a wave on passing obliquely from one transparent medium into a second medium in which its speed is different, as the passage of a light ray from air into glass.

Answer 2

Both diffraction and refraction involve change of direction of waves. When a wave encounters an obstacle, bending or spreading occurs, which we call diffraction. On the other hand, waves refract when they travel from one medium to another. Light waves, when diffracted result in a diffraction pattern, whereas when they are refracted some sort of visual distortion may take place. Diffraction and refraction both can split the white light in to separate colors. When white light is sent through a glass prism it refracts and splits according to the wavelengths of each color, because the refractive index of glass is different from that of air. Similarly, we can observe the rainbow pattern on a CD or DVD, since they act as diffraction gratings.

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Answer 3

DIFFRACTION - diffraction is bending of light at the corner of an obstacle . eg: DIFFRACTION OF LIGHT REFRACTION -Refraction is the bending of a wave when it enters a medium where it's speed is different. The refraction of light when it passes from a fast medium to a slow medium bends the light ray toward the normal to the boundary between the two media. The amount of bending depends on the indices of refraction of the two media and is described quantitatively by Snell's Law

Answer 4

Diffraction is the spreading of light that happens where light passes an obstruction. Refraction is the bending of light that happens when light moves from one medium into another of different refractive index - that is when the light wave slows down or speeds up.

Answer 5

Refraction is the bending of light as it passes from one medium to another...like water to air...or from glass (lens) to air.
Diffraction is the bending of light as it passes an obstacle such as the edge of a slit or aperture.

Answer 6

Refer to the links below:

http://en.wikipedia.org/wiki/Diffraction

http://en.wikipedia.org/wiki/Refraction