Advertisements
Advertisements
प्रश्न
What is a total reflecting prism?
उत्तर
A prism having an angle of 90° between its two refracting surfaces and the other two angles each equal to 45°, is called a total reflecting prism because the light incident normally on any of its faces, suffers total internal reflection inside the prism.
APPEARS IN
संबंधित 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?
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.
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 ______.
A total reflecting right angled isosceles prism can be used to deviate a ray of light through ______.
State three actions that a total reflecting prism can produce.
Complete the path of ray PQ through the glass prism ABC shown in Fig. till it emerges out of the prism. Given the critical angle of the glass is 42°.
Draw a diagram to show one such action of the total reflecting prism.
