Question

while tracing the path of a ray of light passing through a rectangular glass slab write are two law of reflection

Answer 1

its not laws of reflection it is laws of refraction (snele's laws)
laws of refraction..
(i) The incident ray, the refracted ray, and the normal at the point of incidence all lie in the same plane.
(ii) The ratio of the sine of angle of incidence to the sine of the angle of refraction is a constant and this constant is called the index of refraction or refractive index.
$\sin(i) \div sin(r) = constant$
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Answer 2

The laws of reflection are three in number and are associated with the incoming ray, the angle and the reflected ray and also the medium.  

Explanation:  

• The two fundamental laws that explain the process of reflection are that the incident ray, when falls on a medium then the point of incidence, the point of origin of the reflected ray and the normal that is drawn on the interface of reflection all lie in the same point.
• Secondly, the other law of reflection states that the angle of reflection is exactly equal to the angle of incidence.

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