iPad 10:21 AM session.masteringphysics.com MasteringPhysics: Hw8-optics 1 A Conc

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iPad 10:21 AM session.masteringphysics.com MasteringPhysics: Hw8-optics 1 A Concave Mirror Is To Form An Image Of Thefilamen..1C Problem 24.55 MasteringPhysics 7 of 14 Problem 24.55 A concave mirror is to form an image of the filament of a headlight lamp on a screen 8.50 m from the mirror. The filament is 6.50 mm tall, and the image is to be 39.0 cm tall. Part A How far in front of the vertex of the mirror should the filament be placed? 8= 14.2 cm Submit Give Up Correct Significant Figures Feedback: Your answer 14.16 cm was either rounded differently or used a different number of significant figures than required for this part. Part B To what radius of curvature should you grind the mirror? cm

Explanation / Answer

the object distance given as 14.2 (part a answer)

we use the mirror formula to get the second answer

1/f=1/do+1/di

1/f=1/14.2+1/850

==> f=13.96 cm

Radius of curvature R = 2f=27.93 cm

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