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Earth receives energy at the rate of 2.5...

Earth receives energy at the rate of `2.5"cal /cm"^2` min . Calculate the number of photons received on the Earth. Per `cm^2` per minute if the average wavelength of solar light is 500 nm. Take 1 calorie = 4.2 J

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AI Generated Solution

To solve the problem of calculating the number of photons received on Earth per cm² per minute when the energy received is 2.5 cal/cm²/min and the average wavelength of solar light is 500 nm, we can follow these steps: ### Step 1: Convert Energy from Calories to Joules We know that 1 calorie = 4.2 Joules. Therefore, we can convert the energy received in calories to joules. \[ \text{Energy received} = 2.5 \, \text{cal/cm}^2/\text{min} \times 4.2 \, \text{J/cal} = 10.5 \, \text{J/cm}^2/\text{min} \] ...
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Solar constant is defined as energy received by Earth per cm^(2) per minute. Find the dimensions of solar constant.

How many photons are received on earth per cm^-2 per hour if the energy from the sun reaching on the earth is at the rate of 2cal cm^(-2) min^(-1) and average wavelength of solar light be taken as 5500Å. Use h=6.6xx10^(-34)J , c=3xx10^8ms^(-1) and 1cal =4,2J

Knowledge Check

  • Energy from the sun is received on the earth at the rate of 9J//cm^(2)// minute. The average wavelength of solar light is taken as 5500 Å. How many photons are received on the earth per cm^(2) per minute? [h=6.6xx10^(-34)J-s]

    A
    `2.2xx10^(17)`
    B
    `1.8xx10^(19)`
    C
    `2.5xx10^(19)`
    D
    `1.5xx10^(18)`

  • Energy from the sun is recived on earth at the rate of 2 cal per cm^(2) per min. If avergae wavelength of solar light be taken at 5500 A then how many photons are recived on the earth per cm^(2) per min ? (h =6.6 xx 10^(-34)J-s, 1cal = 4.2J)

    A
    `1.5 xx 10^(13)`
    B
    `2.9 xx 10^(13)`
    C
    `2.3 xx 10^(19)`
    D
    `1.75 xx 10^(19)`

  • Solar constant may be defined as the amount of solar energy received per cm^(2) per minute. The dimensions of solar constant is

    A
    `[ML^(2)T^(-3)]`
    B
    `[ML^(0)T^(-1)]`
    C
    `[ML^(0)T^(-2)]`
    D
    `[ML^(0)T^(-3)]`

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