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  • A ray of light passing through the point (2, 4) is reflected on the x-axis at a point P and passes through the point (5, 3). Then the abscissa of the point P is <st

A ray of light passing through the point (2, 4) is reflected on the x-axis at a point P and passes through the point (5, 3). Then the abscissa of the point P is 

Option: 1

-26/3


Option: 2

-26/7


Option: 3

26/3


Option: 4

26/7


Answers (1)

best_answer

 

 

Reflection of Light -

Reflection of Light

Laws of reflection

  1. The incident ray, the normal ray and the reflected ray to a surface at the point of an incident all lie on the same plane.

  2. The angle of incident = angle of reflection

-

 

 

Let N be the image of M (5, 3) with respect to x-axis. Thus N is (5, –3)

Slope of NQ = \frac{-3-4}{5-2}=\frac{-7}{3}

Therefore, the equation QN is

(y-4)=\frac{-7}{3}(x-2)

7x + 3y = 26

Point P is (26/7, 0)

 

 

Posted by

Suraj Bhandari

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