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Question
Which colour of light travels fastest in any medium except air?
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Solution
The red colour of light will travel the fastest in any medium.
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RELATED QUESTIONS
With the help of diagram of the principal section of a prism, indicate its refracting surfaces, refracting edge and base.
The diagram alongside shows the refraction of a ray of light from air to a liquid.
- Write the values of (i) angle of incidence, (ii) angle of refraction.
- Use Snell’s law to find the refractive index of liquid with respect to air.
Trace the path of a ray of light incident at an angle of 45° on a rectangular glass slab. Write the measure of the angle of refraction, the angle of emergence and the lateral displacement suffered by the ray as it passes through the slab.
Rahim recorded the following sets of observations while tracing the path of a ray of light passing through a rectangular glass slab for different angles of incidence.
|
S. No. |
Angle of incidence |
Angle of refraction |
Angle of emergence |
|
I |
45° |
41° |
45° |
|
II |
40° |
38° |
38° |
|
III |
45° |
41° |
40° |
|
IV |
41° |
45° |
41° |
The correct observation is recorded at serial number:
(1) I
(2) II
(3) III
(4) IV
Which colour of light travels fastest in any medium except air?
A total reflecting equilateral prism can be used to deviate a ray of light through:
A ray of light passes from water to air. How does the speed of light change?
What is the refractive index of vacuum
Name two instruments of the total refracting prism in which is used.
