wasn't sure were to put this i know its not exactly advanced but is to me , only place to post that made sence so tell me if i'm wrongh
year 10 gcse question: The shutter speed, S, of a camera varies inversely as the square of the aperture setting, f. When f= 8, S= 125
a) find a formula for S in terms of f.
b) Hence, or otherwise calculate the value of S when f= 4
thanks for any time anybody spends on this question
Rob
Edit: i have some answers now but am not sure if there correct so if possible could somebody answer both the questions so i can check the answers / working
year 10 gcse question: The shutter speed, S, of a camera varies inversely as the square of the aperture setting, f. When f= 8, S= 125
a) find a formula for S in terms of f.
b) Hence, or otherwise calculate the value of S when f= 4
thanks for any time anybody spends on this question
Rob
Edit: i have some answers now but am not sure if there correct so if possible could somebody answer both the questions so i can check the answers / working