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A barber wants to set up a salon in a room measuring length of 3m by 3m. he has a simple wooden chair, 3 large mirrors and one bulb. using the knowledge of shadows and reflection, advise the barber on how to arrange a good salon using the only items he has. without adding more sources of light, how can he enhance the lightning in his salon.

Respuesta :

According to law of reflection, the barber should place one mirror in front of the chair and two mirrors on the left and right sides of the chair perpendicular to the front mirror. According to law of shadows, the bulb should be placed above the chair.

What is the law of refraction?

The angle of incidence is equal to the angle of reflection.

  • According to the law of reflection, when two mirrors are placed parallel to each other, then infinite images are formed. So if the bulb is placed between two parallel mirrors, then there will be more light.
  • By using the front mirror and the side mirrors, the person can see his hair from all sides.

What is the law of shadow?

The length of the shadow of an opaque substance on the surface decreases as the angle between the blocked light ray and the surface plane increases.

  • According to the law of shadows, when the light falls on an opaque substance perpendicularly, then no shadows are formed. So hairs will be easily visible to the barber.
  • So the light should be placed above the chair.

Learn more about law of reflection.

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