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Incident light angle brightness 
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#1
Feb2207, 07:50 PM

P: 31

when light hits a surface at an angle. it is darker if it hits it at higher angle(facing away) than at a lower angle(facing towards). 1
Is there a formula for the brightness.The relationship of angle to brightness does not look linear. http://www.vam.ac.uk/vastatic/micros...w/?movie=light1 


#2
Feb2307, 12:55 PM

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P: 2,026

The brightness would go like cos of the angle.



#3
Feb2307, 04:46 PM

P: 2,056

Is this only because the greater the angle, the greater the surface area that the beam interacts with? Or are there other factors?



#4
Feb2407, 07:47 AM

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Incident light angle brightness
It is just that Intensity = Power/area



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