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Difficulty: EasyPhysics Fundamentals and Everyday Applications

Match List-I (Everyday Physical Phenomenon) with List-II (Underlying Physics Principle) and select the correct match:

  • Formation of mirage in hot desertsTotal Internal Reflection
  • Spherical shape of small falling raindropsSurface Tension
  • Blue appearance of the clear daytime skyRayleigh Scattering
  • Operation of hydraulic brakes in automobilesPascal's Law

Answer

Formation of mirage matches with Total Internal Reflection; Spherical shape of raindrops matches with Surface Tension; Blue sky appearance matches with Rayleigh Scattering; Hydraulic brakes operation matches with Pascal's Law.
Each everyday phenomenon directly corresponds to its core physical law: mirages result from total internal reflection in stratified air temperatures, raindrops assume a minimal surface area sphere due to surface tension, the blue sky is produced by Rayleigh scattering of shorter light wavelengths, and hydraulic brakes transmit force via Pascal's law of fluid pressure.

Step-by-Step Solution

1
Identify the cause of desert mirages
Total Internal Reflection
Superheated air near the ground creates a steep refractive index gradient, causing light to undergo total internal reflection.
2
Identify why raindrops are spherical
Surface Tension
Surface tension forces liquid surfaces to contract into the minimal surface area configuration, which is a sphere.
3
Identify the mechanism behind the sky's blue color
Rayleigh Scattering
Rayleigh scattering intensity is inversely proportional to the fourth power of wavelength, causing shorter blue wavelengths to scatter widely.
4
Identify the principle governing hydraulic brakes
Pascal's Law
Pascal's law governs fluid pressure transmission in confined systems, allowing force amplification in hydraulic brakes.

Key Concept

Everyday Applications of Optics, Surface Phenomena, and Fluid Mechanics
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Topics

Physics Fundamentals and Everyday Applications

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