Question

Please answer parts A-D

(8%) Problem 10: Often in opties scientists take advantage of effects that require very high intensity light. To get the desired effect a scientist uses a laser with power P - 0.0025 W to reach an intensity of 7 = 430 W/cm by focusing it through a lens of focal length - 0.19 m. The beam has a radius of r -0.0019 m when it enters the lens. Randomized Variables P = 0.0025 W 1 - 430 Wiem - 0.19 m P=0.0019 m 25% Part (a) Express the radius of the beam, Yp, at the point where it reaches the desired intensity in terms of the given quantities. (In other words, what radius does the beam have to have after passing through the lens in order to have the desired intensity?) Grade Summary Deductions 04 Potential 1009 tana) a 7 8 cotar a) B d e 4 5 6 Submissions Attempts remaining ( per attempt detailed view - B 12 3 - m P Tp t vo Submit Igre up! Hints: deduction per hit Hints remaining 2 Feedback: O deduction per feedback 259. Part (b) Give an expression for the tangent of the angle that the edge of the beam exits the lens with with respect to the normal to the lens surface, in terms of rand 2596 Part (c) Express the distance, D, between the lens's focal point and the illuminated object using tan(a) and p 259 Part (d) Find the distance. Din centimeters

Answer 1

Partai We know that, PEIXA P=IXTO? . 8p²=P IXTT &p=JP IXTT Pastb; Fgom the pay diagram, tanar 0 20 f partei trana 8 f tana = 80 0 so, D = 8p tand. Pastal = 2 op D = fx op = fx pa = 0.19 INT 8 0.0025 430x3.19 0.0019 m) D -0.136 cm