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10Diamonds sparkle due to total internal reflection.
The critical angle for glass is smaller than that of diamond.
Air bubbles in water shine because light refracts into water.
The immersed part of a test tube appears shiny due to TIR.
Mirage is an illusion caused by refraction of light only. →
Hot air near a road acts as the rarer medium in a mirage.
Mirage can appear flickering because air layers have continuously changing refractive indices.
During the day, sound waves bend downwards due to refraction.
At night, sound waves can undergo total internal reflection, allowing long-distance hearing.
Total internal reflection occurs only in liquids, not in gases or solids.
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Why does a diamond sparkle more than a glass block?
The angle of incidence inside a diamond must be:
An air bubble inside water appears shiny because:
Mirage formation occurs due to:
In a mirage, the layer of hot air near the surface behaves as:
In daytime, sound waves bend:
At night, sound waves can be heard clearly at a distance because:
The critical angle of glass is:
Total internal reflection occurs when light travels from:
Which of these is a consequence of TIR in daily life?
The phenomenon that allows light to be reflected entirely inside a denser medium is called ______ internal reflection.
Diamonds sparkle because their ______ angle (24°) is smaller than the angle of incidence of light inside them.
Glass cut in the shape of a diamond does not sparkle as much because its ______ angle is 42°.
Air bubbles inside water appear ______ due to total internal reflection at the water-air interface.
The immersed part of a glass test tube appears shiny because light undergoes total internal reflection at the ______-air interface.
A ______ is an optical illusion caused by total internal reflection of light in layers of air with different temperatures.
In a mirage, the hot air near the surface acts as the rarer medium, and the cooler air above acts as the ______ medium.
The inverted image of objects in a mirage appears on the ______ of the road to the observer.
During the day, sound waves bend upwards due to refraction in layers of air, making distant sounds ______ to hear.
At night, sound waves can undergo total internal reflection in cooler air layers, allowing sounds to be heard ______ at a distance.