bioe101-spring05-mt2-Fletcher_Conolly-soln - Midterm Exam...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Midterm Exam II 4/7/05 Please answer the following questions using only your page of notes and a calculator. Problems 1 & 2 are worth 25 points each, problems 3 & 4 are worth 20 points each, and problem 5 is worth 10 points (100 points total). Useful constants ma~ include c = 3 X 108 mis, po = 4~x to-7 Ns2/C'-, ~ = 8.8542 X to-12 C'-lNm2, and h = 6.6256 x 10.4 Js. (1) The net power radiated by the sun is, on average, 3,9 x Hr6 W. ... . .'."',' ,. '.'.. ".." \A} ~W1IlIl!) IlV IVi)i)~ VII "1'" Ulp .uVIlI "1'" "WlI IV IU'" &.JCUlla, 0""_1 ." II"" 'U"""" ,,"U}lU""""" V' the electric field of the radiant energy arriving at the top of the Earth's atmosphere (1.5 x 1011 m from the sun)? (b) What IS the ampl1tuC1e 01 tile magneuc nelO-( (c) Assuming the transmittance of the atmosphere (-10 km hIgh) is 50% and the Beer's law absorption coefficient a for skin is 2.0/mm, how deep will the light penetrate before it is attenuated to I % of its intensity at the skin surface? (d) If a layer of sunscreen is added that acts like a ND = 1.0 filter, what is the new depth at which the light is attenuated to 1 % of its surface intensity? (2) A single thin lens is used to make a microscope. The distance between the object and its ima~e is kent constant. and different lenses are used to achieve different mamifications. (a) If one lens with a focallengthji gives a transverse magnification of MI. what is the flV'~11"'"oth f.. nfSlnnth_1Pn~ aiv1no tw1r.P. thp. mSlDn1fir.Slhnn f1n tfl!l'm1Z nff. Slntt u.\?...
View Full Document

This note was uploaded on 09/16/2009 for the course BIO ENG 101 taught by Professor Conolly during the Spring '09 term at University of California, Berkeley.

Page1 / 7

bioe101-spring05-mt2-Fletcher_Conolly-soln - Midterm Exam...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online