If the Sun were larger or closer, the Earth would be too hot to be liveable. Or if it were weaker or farther away, the Earth would be completely frozen.
Its Adrian Dias
UVC radiation, which has wavelengths between 100 and 280 nanometers, does not reach the Earth's surface because it is absorbed by the ozone layer in the atmosphere. This type of UV radiation is the most harmful to living organisms, but the ozone effectively protects us from its damaging effects. Therefore, while UVA and UVB rays can penetrate the atmosphere and reach the Earth, UVC is completely filtered out.
Sunlight or Solar Radiation is essentially photons, or packets of energy, emmited from the suns surface, which are able to travel through the vacuum of space at the speed of light. This comes to us in a range of wavelengths, including Visible light, Ultra violet and Infra red radiation.
The sun's heat reaches the Earth through radiation, not conduction or convection. Radiation is the transfer of heat energy in the form of electromagnetic waves, such as light and infrared radiation, which can travel through the vacuum of space to reach us. Conduction and convection require a material medium, which is not present in the vacuum of space.
By radiation mode
Electromagnetic energy from the Sun crosses the interplanetary void in about 8 minutes to reach Earth. The energy reaches us as electromagnetic radiation in a very wide range of wavelengths. Some of these wavelengths can be sensed directly by humans as heat and light. Some wavelengths (frequencies) are transformed by interaction with matter into other wavelengths that interact with the hydrosphere, biosphere, etc. to make life on Earth possible.
It's the only way heat could reach us. It comes via electromagnetic radiation, discovered theoretically by James Clerk Maxwell. It can't come by conduction or convection because space is empty, there is no air there.
Radiation is the type of heat transfer that can occur even in the absence of matter. It does not require any medium to transfer heat, as it can travel through a vacuum. This is why the Sun's heat can reach us here on Earth through the vacuum of space.
The sun heats us through the process of radiation. Electromagnetic waves from the sun, including infrared and visible light, travel through space and reach Earth's surface, where they are absorbed and converted into heat energy.
No, the ozone layer primarily protects Earth from the sun's harmful ultraviolet (UV) radiation. Meteors can still penetrate Earth's atmosphere and reach the surface regardless of the presence of the ozone layer.
The earth's magnetic field protects us and the earth from things such as solar winds and cosmic particles/radiation as well as solar radiation. Essentially, the magnetic radiation protects us from all harmful waves, varying from infrared rays to gamma rays.
More energy reaches us through radiation. Conduction transfers heat through molecules touching each other, which is less efficient over long distances compared to the electromagnetic radiation that carries heat energy from the sun to Earth through the vacuum of space.