what are laws of refraction?
Answers
Answer:
Refraction
The change in direction or bending of a light wave passing from one transparent medium to another; caused by the change in wave’s speed is known as “Refraction”.
An example to understand this better is that of placing a straw/stick in a glass of water wherein it to be bent when viewed from any other angle than 900 to the surface. This happens because of the bending of light rays as they move from air to glass. This bending of light depends on the speed of light in air and glass and the speed is dependent on the wavelength.
Another example of refraction is if you take a pencil and dip it in water, the pencil appears to be bent. It does not appear straight. Why is the pencil appearing bent even though it is a straight nice pencil? This is because of a phenomenon of refraction. The medium involved here is air and water. As soon as the light waves enter the water, the light rays bend and because of this bending of light waves, we see the pencil as broken.
The extent of bending of light rays entering from one medium to another is the “Refractive Index”. It is denoted by the letter ‘n’. It is represented as :
n = c/v
where c = velocity/speed of light of a certain wavelength in the air and v = velocity of light in any medium
Explanation:
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Answer:
The change in direction or bending of a light wave passing from one transparent medium to another; caused by the change in wave’s speed is known as “Refraction”.
The angle of incidence is the angle between the incident ray and the normal; denoted as ‘i’. The angle of refraction is the angle between the refracted ray and the normal; denoted as ‘r’. Laws of refraction state that:
- The incident ray, reflected ray and the normal, to the interface of any two given mediums; all lie in the same plane.
- The ratio of the sine of the angle of incidence and sine of the angle of refraction is constant.
FORMULA - n1/n2 = sin α2/sin α1
Explanation:
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