How is the formula for calculating solar pressure derived?

In summary, solar pressure is calculated by multiplying the solar constant, cross-sectional area of the object, and the cosine of the angle between the object's surface and the direction of sunlight. The formula for calculating solar pressure is P = F/A, and it is typically measured in units of Pascals or Newtons per square meter. Factors such as distance from the sun, angle of incidence of sunlight, and reflective properties of the object's surface can affect the calculation of solar pressure. In spacecraft design, solar pressure is used to determine the trajectory and stability of the spacecraft, as well as the size and orientation of solar panels for optimal energy generation.
  • #1
IcedB
6
0
Can anyone explain how the following formula is derived:
Force (F) = 2(P x A)/c
P=power A= Area
 
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  • #2
It would appear that's just twice the momentum flux of radiation reflecting off of some area:

[tex]2 n \frac {h \nu}{c} A = 2 \frac {P A}{c}[/tex]

where n is the photon density. In other words, energy flux is the same as momentum flux divided by c.
 

FAQ: How is the formula for calculating solar pressure derived?

How is solar pressure calculated?

Solar pressure is calculated by multiplying the solar constant (the amount of solar energy received on Earth's surface) by the cross-sectional area of the object and the cosine of the angle between the object's surface and the direction of the sunlight.

What is the formula for calculating solar pressure?

The formula for calculating solar pressure is P = F/A, where P is the pressure, F is the force of the sunlight, and A is the area of the object.

What units are used to measure solar pressure?

Solar pressure is typically measured in units of Pascals (Pa) or Newtons per square meter (N/m²).

What factors can affect the calculation of solar pressure?

The calculation of solar pressure can be affected by factors such as the distance from the sun, the angle of incidence of sunlight, and the reflective properties of the object's surface.

How is solar pressure used in spacecraft design?

Solar pressure is an important factor in the design of spacecraft, as it affects the trajectory and stability of the spacecraft. It is also used to determine the size and orientation of solar panels for optimal energy generation.

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