Advertisements
Advertisements
प्रश्न
Explain why, if we look at objects through the hot air over a fire, the objects appear to be moving (or shaking) slightly.
उत्तर
If we look at objects through the hot air over a fire, they appear to be moving or shaking slightly because of the refraction of light. When the air just above the fire gets heated up, it becomes optically rarer than the colder air further above the fire, which is optically denser. Now, when we look at objects over a fire, the light coming from them through two different mediums of different optical densities undergoes refraction, or bending of light, randomly, which makes the objects appear to be moving slightly.
APPEARS IN
संबंधित प्रश्न
With the help of a labelled diagram, explain why the sun appears reddish at the sun-rise and the sun-set.
What did Newton demonstrate by his experiments with the prism?
How many colours are there in a full spectrum of white light? Write the various colours of spectrum in the order, starting with red.
Name some everyday objects:
which absorb all the colours in sunlight
Name the phenomenon due to which the stars seem higher in the sky than they actually are.
What is tyndall effect? Explain with an example.
Explain in brief the reason for the following :
Advanced sunrise
Explain in brief the reason for the following :
Delayed sunset
The clear sky appears blue because:
Is the position of a star as seen by us its true position? Justify your answer.
