&Quot;Near-Infrared Radiation Represents What Proportion Of The Total Energy Emitted By The Sun”?

Of the light that reaches Earth’s surface, infrared radiation makes up 49.4% of while visible light provides 42.3% 9. Ultraviolet radiation makes up just over 8% of the total solar radiation. Each of these bands has a different impact on the environment.

How much infrared radiation does the sun emit?

In terms of energy, sunlight at Earth’s surface is around 52 to 55 percent infrared (above 700 nm), 42 to 43 percent visible (400 to 700 nm), and 3 to 5 percent ultraviolet (below 400 nm).

What percentage of the energy from the sun is radiation?

The atmosphere radiates heat equivalent to 59 percent of incoming sunlight; the surface radiates only 12 percent. In other words, most solar heating happens at the surface, while most radiative cooling happens in the atmosphere.

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What portion of the total energy from the sun arrives at Earth as infrared radiation?

Satellite measurements indicate that the atmosphere radiates thermal infrared energy equivalent to 59 percent of the incoming solar energy. If the atmosphere is radiating this much, it must be absorbing that much.

What is the total energy emitted by the sun?

The total power emitted by the sun is calculated by multiplying the emitted power density by the surface area of the sun. The sun has a radius of 695 x 106 m 4 giving a surface area of 6.07 x 1018 m2. Thus the total power output of the sun is 64 x 10 times 6.09 x 1018 m2, which is equal to 3.9 x 1026 watts.

What emits infrared radiation?

Since the primary source of infrared radiation is heat or thermal radiation, any object which has a temperature radiates in the infrared. Even objects that we think of as being very cold, such as an ice cube, emit infrared. The warmer the object, the more infrared radiation it emits.

How much energy does the sun produce per square meter?

At Earth’s average distance from the Sun (about 150 million kilometers), the average intensity of solar energy reaching the top of the atmosphere directly facing the Sun is about 1,360 watts per square meter, according to measurements made by the most recent NASA satellite missions.

How is energy from the sun distributed around Earth?

In the atmosphere, however, the energy provided by the sun is distributed around the Earth by winds, precipitation, and evaporation processes. Heat energy is transmitted through processes of Conduction, Convection, and Radiation.

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What percentage of energy coming from the sun is re radiated towards the space?

30% is directly reflected back i.e re-radiated towards space by clouds, the earth’s surface, and different gases and particles in the atmosphere (the earth’s albedo is 0.3 on average).

How do you calculate the energy emitted by the Earth?

In order to calculate the total amount of energy arriving at Earth, we need to know how much area is being lit. We then multiply the area by the insolation (in units of energy flow per unit area) to find out the total amount of incoming energy.

How much of the radiation received from the sun does the Earth reflect?

The Earth absorbs most of the energy reaching its surface, a small fraction is reflected. In total approximately 70% of incoming radiation is absorbed by the atmosphere and the Earth’s surface while around 30% is reflected back to space and does not heat the surface.

What is the total amount of solar energy received by earth and atmosphere Mcq?

What is total amount of solar energy received by earth and atmosphere? Explanation: Even if we use 5% of this energy, it is more than 50 times our requirement. The total solar radiation absorbed by the earth and its atmosphere is 3.8 X 1024 Joules/year.

How much energy does the Earth receive from the sun per second?

In terms of mass, you can think of the total energy output as about 4,000,000 tons every second. When the curvature of the Earth and the density of the luminosity that hits our planet is considered, we receive only about 4.5 pounds per second of that energy.

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How much energy does the Sun have in joules?

The Sun emits 3.8 x 10^33 ergs/sec or 3.8 x 10^26 watts of poweror each second, an amount of energy equal to 3.8 x 10^26 joules. In one hour, or 3600 seconds, it produces 1.4 x 10^31 Joules of energy or 3.8 x 10^23 kilowatt-hours.

How do you calculate power emitted?

The total power radiated is P = watts = x10^ watts. Finding the power radiated within a given wavelength range requires integration of the Planck radiation formula over that range. The radiated power per unit area is the Planck energy density multiplied by c/4.

What is the total energy output of the Sun in one day?

Every day the sun generates about 3.94 X 10 23 kW. The energy radiated takes about 8 minutes to cover the 93 million miles to earth. The total energy which reaches the earth surface is about 80,000 X 10 12 W which is 10,000 times the current global energy demand.

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