7.02 reflection in plane mirrors (1)

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7. Rays and waves

• 7.02 reflection in plane mirrors (1)

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7.02 light rays and waves

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7.02 Reflection in plane mirrors

• When a ray of light is incident on a material
  like mirror, it undergoes reflection. The
  incoming ray is incident ray, the outgoing ray is
  the reflected ray and the line at right- angles
  to the mirrors surface is called a normal. The
  angle between the incident ray and the normal is
  called the angle of incidence. The angle between
  the reflected ray and the normal is called the
  angle of reflection.

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7.02 Reflection in plane mirrors

• Laws of reflection
• The angle of incidence is equal to angle of
  reflection.
• The incident ray, the reflected ray and the
  normal all lie in the same plane.

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7.02 Reflection in plane mirrors

• Reflection in plane mirror

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7.02 Reflection in plane mirrors

• Rules for image size and position
• The size of the image is same as that of the
  object.
• The image is as far behind the mirror as the
  object is in front.
• A line joining equivalent points on the object
  and the image passes through the mirror at right
  angles.
• Note The image is laterally inverted and virtual

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7.02 Reflection in plane mirrors
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7.02 Reflection in plane mirrors

• Real and virtual images
• For a real image light rays actually converge
  at a point to form the image.
• for a virtual image, the rays appear to
  converge. E.g. image in a plane mirror.