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)`

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]

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

The energy flux of sunlight reaching the surface of the earth is 1.388xx10^(3)Wm^(-2) . The photons in the sunlight have an average wavelength of 550 nm. How many photons per square metre are incident on the earth per second ?

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

A 600 W mercury lamp emits monochromatic radiation of wavelength 331.3 nm. How many photons are emitted from the lamp per second? (h =6.626 xx10^(-34)" Js, velocity of light "=3xx10^(8)ms^(-1))

Solar constant is defined as energy received by Earth per cm^(2) per minute. Find the dimensions of solar constant.

Calculate the energy in eV for each photon for light of wavelength 4950Å . Take h=6.6xx10^(-34)J-s

The energy reveived from the sun by the earth and surrounding atmosphere is 2 cal cm^(-2) "min" ^(-1) on a surface normal to the rays of sun. Q. What is the total energy received, in joule, by the earth and its atmosphere?