The Beer–Lambert–Bouguer law: When light strikes the surface of a medium such as water or glass, its intensity decreases with depth. The Beer– Lambert–Bouguer law states that the percentage of decrease is the same for each additional unit of depth. In a certain lake, intensity decreases about 75% for each additional meter of depth.
a. Explain why intensity I is an exponential function of depth d in meters. ➞
b. Use a formula to express intensity I as an exponential function of d. (Use I0 to denote the initial intensity.)
c. Explain in practical terms the meaning of I0.
d. At what depth will the intensity of light be onetenth of the intensity of light striking the surface?
Already registered? Login
Not Account? Sign up
Enter your email address to reset your password
Back to Login? Click here