Question

What is the working of isoceles prism?

Answer 1

Right angled isosceles prism can turn light through 90o or 180o. This is based on total internal reflection. Since m for glass-air is 1.5, the value of 'C' is 42o. In such a prism, the angle of incidence in the denser medium is 45o(>C) and hence light suffers total internal reflection.

Answer 2

Answer:

To deviate a ray of light through 90 degrees, use a complete reflecting right angled isosceles prism.

Explanation:

Right angled isoceles prism:

• Isosceles triangles are commonly used in architecture and design, such as in building pediments and gables, and have been used as decoration since even earlier times. The triangle's third side, which is also equivalent to the other two sides, is referred to as the base.

• One aspect of an isosceles glass prism with refractive index  is covered in silver. Normally, a light ray strikes the opposite visage.(which is equal to the silvered face). After being reflected twice on faces of the same size, the light beam exits the prism perpendicularly through the base.

• These prism turn the light by 90°or 180°. They are based on the phenomenon of total internal reflection of light. The refractive index for glass is 1.5, therefore the critical angle for glass - air interface is 42° (as refractive index = 1/sin ic).

∴To deviate a ray of light through 90 degrees, use a complete reflecting right angled isosceles prism.

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