Question

what is spectrum ? what are the laws of refraction​

Answer 1

Answer:

A spectrum is a condition that is not limited to a specific set of values but can vary, without steps, across a continuum.

The laws of refraction are:

• The incident ray, reflected ray and the normal, to the interface of any two given mediums; all lie in the same plane.
• 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. This law is also known as snells law of refraction.

i.e N=sin i/sin r.