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## How does the sun absorb radiation from the earth?

The Earth radiates energy at wavelengths much longer than the Sun because it is colder. Part of this longwave radiation is absorbed by greenhouse gases which then radiate energy into all directions, including downwards and thereby trapping heat in the atmosphere.

## How does the sun heat the atmosphere?

Most of the electromagnetic radiation that comes to the earth from the sun is invisible. Only a small portion comes as visible light. Most of the solar radiation is absorbed by the atmosphere and much of what reaches the earth’s surface is radiated back into the atmosphere to become heat energy.

## What happens to the temperature of the atmosphere as it absorbs light from either the sun or from Earth’s surface?

Once visible light from the Sun reaches the surface of Earth, it can either be reflected back towards space as visible light or be absorbed by the ground. Reflected light does not change the temperature of the surface, while absorbed light causes the temperature of the surface to increase.

## What happens when the sun warms the Earth’s surface?

The Sun illuminates Earth. The light radiated by the Sun carries energy. When this light reaches a surface, part of it gets absorbed and transformed into heat. When Earth’s surfaces are exposed to the sun, they absorb some of the light and become warmer.

## How long does it take for the Suns heat to reach Earth?

8 minutes and 20 seconds

## What speed does heat travel?

Heat radiation travel at a speed 3×108 m/sec. It follows a straight line path.

## Does heat go from hot to cold?

Heat flows from hot to cold objects. When a hot and a cold body are in thermal contact, they exchange heat energy until they reach thermal equilibrium, with the hot body cooling down and the cold body warming up.

## Is light faster than heat?

Light and thermal radiation travel at the exact same speed through vacuum. Heat is conducted more slowly, but the heat from the sun is not being conducted to Earth.

## How is heat transmitted?

Heat moves in three ways: Radiation, conduction, and convection. Radiation happens when heat moves as energy waves, called infrared waves, directly from its source to something else. This is how the heat from the Sun gets to Earth. In fact, all hot things radiate heat to cooler things.

## Can a vacuum transfer heat?

Heat does transfer through a vacuum, through a process called radiation (hot objects glow, but they may be glowing below the human range of vision, like in the infrared). Convection is a process where material flows around, and that material can carry heat with it. Since a vacuum has no material, there’s no convection.

## Can energy travel in vacuum?

Electromagnetic waves differ from mechanical waves in that they do not require a medium to propagate. This means that electromagnetic waves can travel not only through air and solid materials, but also through the vacuum of space.

## Does heat travel in a vacuum?

Unlike conduction and convection, radiation does not need matter to transfer heat. Energy is radiated from the sun, through the vacuum of space at the speed of light. Some of it passes through and heats up the atoms on the earth’s surface. Some will even be absorbed by your skin.

## Can you feel the heat of the sun in space?

Since there is no way to conduct heat, the temperature of the objects in the space will remain the same for a long time. Hot objects stay hot and cold things stay cold. But, when the sun’s radiations enter the earth’s atmosphere, there is a lot of matter to energize. Hence, we feel the radiation of the sun as heat.

## Does wind exist in space?

In outer space, solar wind is the movement of gases or charged particles from the Sun through space, while planetary wind is the outgassing of light chemical elements from a planet’s atmosphere into space.

## Is there WIFI in space?

Outer space has its perks. Internet connectivity in space is structured around a network of tracking and data relay satellites—the same fleet of communications satellites that NASA engineers on the ground use to communicate with astronauts on the International Space Station.

## What if there was air in space?

The most immediate effect would be the sudden introduction of friction into the former vacuum of space, causing orbits to slow and eventually stop altogether. Here on Earth, everyone would either be crushed under the massive air pressure or flung into space, depending on where they are on the planet.

## What if space isn’t a vacuum?

We wouldn’t exist because there would be no planets. If there were something in space other than mostly nothing, there would be drag on things orbiting stars. Their orbits would decay and they’d crash into the stars.

2021-05-16