9. Choose the correct answer The formula of the Bouguer's law is __ . I=I_(0)e^-k_(lambda l) I=(I_(0))/(e^-k_(lambda )t) I=I_(0)e^k_(xl) I=I_(0)e^-k_(lambda t)

The correct answer is: $I=I_{0}e^{-k_{\lambda }l}$<br /><br />Explanation: Bouguer's law describes the attenuation of light as it passes through a medium. The formula $I=I_{0}e^{-k_{\lambda }l}$ represents the intensity of light $I$ as a function of the initial intensity $I_{0}$, the attenuation coefficient $k_{\lambda}$, and the distance $l$ that the light travels through the medium.