DAILY CURRENT AFFAIRS QUIZ – 27 November 2024

Explanation:

Radio waves, the electromagnetic spectrum’s longest wavelengths, vary from the size of a football to exceeding the dimensions of our planet. Within the ionosphere, an abundance of free electrons exists. When High Frequency (HF) radio waves, possessing frequencies below the ionosphere’s critical frequency, encounter these free electrons, they prompt electron vibrations. Consequently, these vibrating electrons emit the energy back down at the same frequency.

Therefore, it’s not solely the length of the wavelength or its shortness that holds significance. Instead, the wavelength, which is inversely tied to the frequency of the wave, must fall within an appropriate range for the waves to undergo reflection by the ionosphere.

Ans. c
Explanation:
The Earth’s rotation leads to the deflection of winds towards the left in the Southern Hemisphere.

Ans. a

Explanation:

A holds true because wind direction in the Northern Hemisphere follows a clockwise pattern, whereas in the Southern Hemisphere, it adopts an anticlockwise direction. The reasoning is accurate as this phenomenon is primarily attributed to the Coriolis effect.

Ans. a

Explanation:

The moisture content in the atmosphere correlates with the latitude due to the dependency of temperature on the latitude, which, in turn, influences the atmosphere’s capacity to retain moisture.

Ans. b

Explanation:

Intense solar radiation and vigorous convection currents cause air to expand significantly at the equator, leading to the greatest thickness of the atmosphere being found over this region.