Question

A ray of light travelling along the line x +vfiy is incident on the x-axis and after refraction it enters the other side of the x-axis by turning — away from the x-axis. The equation of the line along which the refracted ray travels is

Answer 1

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a ray of light travelling along the line x + y = 1 is inclined on the x axis and after refraction it enters the other side of the x axis by turning 15 degree away from the x axis. the equation of the line along which ythe refraction ray travels is

2 years ago

Answers : (2)

I am assuming you have an idea about the basic principles of refraction.
Now have a look at the figure and it is pretty clear that the slope of the refracted line is

and we have the point where the line x+y=1 meets x axis i.e (1,0), the refracted line will also pass through the same point.
So now we have the standard point slope form given as

we have the line as

is the final answer