Question
What is mirage? Give a reason for its formation?
✓
Answer
Hot sand $($Rarer medium$)$
$\text{MIRAGE}$ : When it is very hot, an inverted image of a tree is seen which is ‘illusion of eye’ $($gives a false impression$)$ of water under the tree. This is called a $\text{MIRAGE}$.”
$\text{REASON}$ : Sand becomes very hot during hot noon, the layers of air in contact become rarer $($expand$)$ while upper layers of air are still at comparatively low temperature and are denser medium.
When rays of light from $\text{DENSER}$ to $\text{RARER}$ medium $($starting from tree$)$ are bent away from normal when refracted from Rarer to Denser medium $($going towards the eye$)$ bend towards normal and a tree appears $\text{INVERTED}$.
$\text{MIRAGE}$ : When it is very hot, an inverted image of a tree is seen which is ‘illusion of eye’ $($gives a false impression$)$ of water under the tree. This is called a $\text{MIRAGE}$.”
$\text{REASON}$ : Sand becomes very hot during hot noon, the layers of air in contact become rarer $($expand$)$ while upper layers of air are still at comparatively low temperature and are denser medium.
When rays of light from $\text{DENSER}$ to $\text{RARER}$ medium $($starting from tree$)$ are bent away from normal when refracted from Rarer to Denser medium $($going towards the eye$)$ bend towards normal and a tree appears $\text{INVERTED}$.
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