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प्रश्न
In the given figure, a ray of light PQ is incident normally on the face AB of an equilateral glass prism. Complete the ray diagram showing its emergence into air after passing through the prism. Take critical angle for glass = 42°.
- Write the angles of incidence at the faces AB and AC of the prism.
- Name the phenomenon which the ray of light suffers at the face AB, AC and BC of the prism.
उत्तर
- At the face AB, i = 0° and at the face AC, i = 60°
- The phenomenon remains unchanged at face AB. Ray QR is incident at 60° > critical angle at face AC.
AC - Total internal reflection at the face, BC - Refraction and ray ST are undeviated.
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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?
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.
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.
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.
