# PHY ch. 26 - 26.2#14 Two rays of light converge toward each...

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26.2 #14 Two rays of light converge toward each other forming an angle of 27°. Before they intersect, however, they are reflected from a circular plane mirror with a diameter of 11 cm. If the mirror can be moved horizontally to the left or right, what is the greatest possible distance d from the mirror to the point where the reflected rays meet? Picture the Problem : The image shows two rays that approach each other at an angle of 27 ° . A mirror of diameter 11 cm is placed in the path of the rays causing them to reflect before they intersect. Strategy: The distance d will be greatest when the rays are incident at the edges of the mirror, 11 cm apart. The reflected rays and the diameter of the mirror form an isosceles triangle. The distance d bisects this triangle forming two right triangles where d is one leg, (11 cm)/2 is the other leg, the reflected ray from the mirror to the point of intersection is the hypotenuse, and θ is 27°/2. Use this triangle to calculate the distance d . Solution:

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## This note was uploaded on 09/03/2008 for the course PHYS 104 taught by Professor Dr.g during the Spring '08 term at Gwinnett Technical College.

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PHY ch. 26 - 26.2#14 Two rays of light converge toward each...

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