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प्रश्न
A ray of light XY passes through a right-angled isosceles prism as shown below
- What is the angle through which the incident ray deviates and emerges out of the prism?
- Name the instrument where this action of the prism is put into use.
- Which prism surface will behave as a mirror?
उत्तर
- Angle of deviation = the angle which the emergent makes with the incident ray
XY = 90° - Periscope
- The prism's surface AB, functions as the mirror.
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संबंधित प्रश्न
Copy the diagram given below and complete the path of the light ray till it emerges out of the prism. The critical angle of glass is 42°. In your diagram mark the angles wherever necessary.
What is a total reflecting prism?
Show with the help of a diagram how a total reflecting prism can be used to turn a ray of light through 90°. Name one instrument in which such a prism is used.
In the following figure, a ray of light PQ is incident normally on the hypotenuse of an isosceles right angle prism ABC.
- Complete the path of the ray PQ till it emerges from the prism. Mark in the diagram the angle wherever necessary.
- What is the angle of deviation of the ray PQ?
- Name a device in which this action is used.
What device other than a plane mirror can be used to turn a ray of light through 180°? Draw a diagram in support of your answer. Name an instrument in which this device is used.
Mention one difference between reflection of light from a plane mirror and total internal reflection of light from a prism.
Draw a neat labelled ray diagram to show the total internal reflection of a ray of light normally incident on one face of a 30°, 90°, 60° prism.
A total reflecting equilateral prism can be used to deviate a ray of light through ______.
State three actions that a total reflecting prism can produce.
Draw a diagram to show one such action of the total reflecting prism.
