Science
The refractive indices of three media are given below:
| Medium | Refractive Index |
|---|---|
| A | 1.6 |
| B | 1.8 |
| C | 1.5 |
A ray of light is travelling from A to B and another ray is travelling from B to C.
(a) In which of the two cases the refracted ray bends towards the normal?
(b) In which case does the speed of light increase in the second medium? Give reasons for your answer.
Answer
(a) The light ray travelling from A to B will bend towards the normal because when a ray of light travels from optically rarer medium to an optically denser medium it moves towards the normal and in this case as nB > nA so, A is a rarer medium and B is a denser medium.
(b) Speed of light increases in the second medium when light travels from B to C. Since speed of light is inversely proportional to refractive index and nB > nC so its speed increases when travelling from B to C.
Related Questions
What is the purpose of making urine in the human body? Name the organs that stores and releases the urine.
Why do arteries have thick and elastic walls whereas veins have valves?
A piece of wire of resistance R is cut into three equal parts. These parts are then connected in parallel. If the equivalent resistance of this parallel combination is R1, what is the value of the ratio R1 : R?
Refer to the image below and state how the magnetic field pattern indicates regions where the magnetic field is stronger outside the magnet? What happens to the magnetic field when the current in the circuit is reversed?
