Show all your work and include units in your answers for full credit. (a) A near

Question

Show all your work and include units in your answers for full credit. (a) A near-sighted person, when not wearing glasses, is only able to see clearly objects (or images) that are 36 cm or less from her eyes. She is in a room with a plane mirror on one wall. She begins walking toward the mirror from the opposite side of the room. How close to the mirror is she when she can first see her image clearly? (b) A flashlight beam shines on a plane mirror as shown below. What is the angle of incidence of the beam? Plane mirror 6, = Reflecting surface 55° (c) Draw the reflected beam. Label the angle of reflection and give its magnitude a, =

Explanation / Answer

a)   since the near sighted distance is 36 cm so she can see herself clearly when she is 18 cm far from the mirror because her image will be 36 cm from her.

b) Angle of incident of beam is measured with respect to Normal to the image.

   90 - 55 = 35 degree

   Angle of incident is 35 degree

c)

magnitude of angle of reflection is = 35o or 35 degree

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