It's from my calculation in the first post for I0. It's in megawatts, I converted it to watts for the second step so I wouldn't have unit problems.
(9.744*105mW/m2)*(1*106/1mW)=9.744*1011.
I used this number to calculate the answer for a) which was correct. Please tell me how it's orders...
The 1.4e-4 was a typing error on my part, it should have been -3, which still yields the initial value for I that I wrote. I did completely err on the m^-1 though. Thank you so much for that!
As for part b, I solved for E using the correct I value of 9.744e11 W/m^2...
Homework Statement
Light in the near-infrared (close to visible red) can penetrate surprisingly far through human tissue, a fact that is being used to "illuminate" the interior of the brain in a noninvasve technique known as near-infrared spectroscopy (NIRS). In this procedure an optical...
Okay so as I wrote above I was using 0.399 m -0.33 m = 0.069 m. It should be 0.33 m - 0.399 m = -0.069 m, which gives me the correct answer. I can't say I really understand the concept of locating the position of the image of the first lens since it never really forms (hits second lens first)...
Homework Statement
A simple camera telephoto lens consists of two lenses. The objective lens has a focal length f1 = +36.0 cm. Precisely 33.0 cm behind this lens is a concave lens with a focal length f2 = -10.0 cm. The object to be photographed is 3.67 m in front of the objective lens.
(a)...
Hello,
I am (obviously) new to the forum. I am in an introductory-level physics course in university and although I had taken a year of physics in high school, these easy intro questions on my homework keep snagging me. This is online homework and I get 5 attempts at the correct solutions...