Diffraction refers to specific kind of interference of light waves. It has nothing to do with true rainbows, but some rainbow-like effects (glories) are caused by diffraction. The refraction is different for each color of light.

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.

Diffraction is defined as the bending of waves around obstacles. The main similarity between the diffraction and refraction is that both involves the interaction of the waves with the substance and also causes the waves to bend and change their direction. Hence, they both involve wave interaction is the correct option.

Refraction is the change in direction of waves that occurs when waves travel from one medium to another. Diffraction is the bending of waves around obstacles and openings.

1 Answer. Refraction is the bending of light as it passes from one medium to another, diffraction is the bending of light as it passes the edge of an object.

There are three laws which govern Reflection and Refraction. These can be very easily derived from geometry.They are: Angle of Incident Ray with Normal(i) EQUALS Reflected Ray with Normal(r).(i=r) Popularly known as SNELL’S LAW it is n1*sin i=n2*sin e where i is same as above,e is angle of refracted beam with normal.

The incident ray refracted ray, and the normal to the interface of two media at the point of incidence all lie on the same plane. The ratio of the sine of the angle of incidence to the sine of the angle of refraction is a constant. This is also known as Snell’s law of refraction.

The first law of refraction states that the incident ray, refracted ray and the normal all lie in the same plane. The second law of refraction states that the ratio of sine of angle of incidence to the sign of angle of refraction is constant to the interface of any two given medium.

Snell’s law, in optics, a relationship between the path taken by a ray of light in crossing the boundary or surface of separation between two contacting substances and the refractive index of each. This law was discovered in 1621 by the Dutch astronomer and mathematician Willebrord Snell (also called Snellius).

the principle that for a ray, radar pulse, or the like, that is incident on the interface of two media, the ratio of the sine of the angle of incidence to the sine of the angle of refraction is equal to the ratio of the velocity of the ray in the first medium to the velocity in the second medium and the incident ray.

Refraction of light is the phenomenon of change in the path of light in going from one medium to another. • In going from a rarer to a denser medium, the ray of light bends towards normal and in going from a denser to a rarer medium, the ray of light bends away from normal.

Refraction is the bending of light (it also happens with sound, water and other waves) as it passes from one transparent substance into another. This bending by refraction makes it possible for us to have lenses, magnifying glasses, prisms and rainbows. Even our eyes depend upon this bending of light.

1 : deflection from a straight path undergone by a light ray or energy wave in passing obliquely from one medium (such as air) into another (such as glass) in which its velocity is different.

Snell’s Law is especially important for optical devices, such as fiber optics. Snell’s Law states that the ratio of the sine of the angles of incidence and transmission is equal to the ratio of the refractive index of the materials at the interface.

1. At the point of incidence, the incident ray, refracted ray and normal all lie in the same plane. When light is travelling from air to a denser medium, the angle of incidence and angle of refraction are related by the ratio sin i / sin r = n whereby n is the refractive index of the denser medium.

For example, to find the sine of angle F (sin F) in the figure, follow these steps:

1. Identify the hypotenuse. Where’s the right angle?
2. Locate the opposite side. Look at the angle in question, which is.
3. Label the adjacent side.
4. Locate the two sides that you use in the trig ratio.
5. Find the sine.

0.7071067812

In a right triangle, one angle is, by definition, 90 degrees so the two acute angles sum to 180- 90= 90 degrees. To prove that sin(45 (degrees)) is 1√2 , consider that if a right triangle has one angle with measure 45 degrees then the other acute angle is 90- 45= 45 degrees also.

1

Now from trignometry we know that sine of an angle in a right angled triangle is ratio of opposite side to the hypotenuse of the triangle, Sin (45) = (1/sqrt (2))/1 = 1/sqrt (2) = (2)^(-1/2). Hence proved.