Chapter 8 : Applied Mathematics

Posts: 81
Joined: Tue May 07, 2013 10:05 am

Chapter 8 : Applied Mathematics

Be the first to discuss this chapter!
jfu.green
Posts: 3
Joined: Thu Jun 27, 2019 7:56 am

Q5 of Warm Up excercises

May someone please explain to me why is the answer A but not C?
Is it asking about the total distance travelled within the mirror before leaving it?

Thank you!
Attachments
Screen Shot 2019-08-22 at 8.14.25 PM.png (41.04 KiB) Viewed 40492 times
sr_vineeth_ruveneco
Posts: 7
Joined: Thu Aug 29, 2013 4:04 pm

Re: Chapter 8 : Applied Mathematics

Hi jfu.green,

The circular mirror has a radius of 5, meaning that its diameter is 5 x 2 = 10.
Where the light begins at one edge of the mirror and travels through the center point to the other side, the total distance would have been 10. This fits with Answer Choice A. Hope this helps!
Brackwom
Posts: 7
Joined: Thu Jun 10, 2021 9:46 am

Re: Chapter 8 : Applied Mathematics

Yes, it helped. Thanks to offer such a helpful response, keep sharing more knowledgeable content.