More solutions to Honors Review are to come

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Honors Review Spring –08 Solutions Prt2

IX. .1 .482 V Toward B Away from A IX.2 1.73x10¹⁰ Vthis is one reason why whole uneutralized coulombs are not found in nature. IX.3 1.92x10^-16 J. IX.4 28.3 ohms; .21 A; yes;I_B =.14 A I_C = .07 A; V_A = 3.2 V V_B=V_C=2.8 V; P_A =.68W P_B = .392 W

P_C = .196W

X. 1 B= 1.4x10^-5 T. X.2 F=1.1x10^-11 N X.3 EMFor voltage = 3532 V

Optics page 27

1. try it but don’t waste any time 2. di = 30cm Mag = 2x 3. AM radio low end of frequency spectrum gamma rays high end 4. 4.37x1014 5. 1.18x10^-14 6.Light passes through real image, light only seems to come from virtual image 7. q_incident = q _refl

8. di =27.5 cm Mi = .83 9.missing in action 10.di =26.7 cm M =1.667 11. f = 30 cm 12 do =15 cm

Refraction and more lenses Page 29

1. ni index of refraction for 1st ( incident) material nr index for 2nd (refracting ) material

qi angle incidence, qr angle of refraction. refraction: bending of light at surface between two materials as speed changes total internal reflection light bends so much away from normal it doesn’t penetrate second material i.e. qr = 90 deg happens only when nr

3. c = 1.94 x10⁸. 4.sinq water /sinq lucite = n_lucite/n_water q_water = 37 deg 5. sin 90 =1 so sinqcrit = n_air/n_water.=1/1.33 qcrit = 48 deg 5. n_gem/n_air = 1/sin 41 = 1.52 so n_obj =1.52 its glass 6. nmatl = sin 37.5/sin 25.6=1.4 7.b 8. total internal reflection and diffraction of sunlight inside water droplets ( don’t waste time on this now) 9. reflection light bounces off and is not transmitted into new medium, refraction: light bends as it enters new medium 11.C its virtual and erect 12. D bends away from normal 13. q_reflect = 45 deg, q_refraction = 32 deg 13. do = 2f so image is real inverted same size di = 2f = 20 cm

15. cglass = 2x10⁸m/s 16. c 17. A 18 still 48 deg.