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Maths & Physics Help

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twilight:
my friend has some notes 4 these topics .. i'll try to get them for u asap.. dont worry ;)

SGVaibhav:

--- Quote from: sgvaibhav on April 25, 2009, 12:48:07 pm ---need help
serious topic
not a small question
its about reflection in plane mirror.
http://www.freeexampapers.com/FreeExamPapers.com_.php?__lo=SUdDU0UvUGh5c2ljcy9DSUUvMjAwNSBOb3YvMDYyNV93MDVfcXBfNi5wZGY=      (O/N 05 Paper6)
Q4)f)
Explain me, and do we draw reflected ray? (markscheme not helping :( )

--- End quote ---

Mr. Paul, plz help me in this question.
ok this is for 4 marks, not small ones like b4, my question is there in the quote

Thank You
:D

astarmathsandphysics:
You have drawn in the normal. Draw 5com the other side of this normal from th card AB then a line from where the nomal meets MM' to the edge of this card. Or you could use the angle v, tanv=x/y. Measure this angle on the other side of the normal from the incident ray then draw the line. We must get some drawing software in the forum

SGVaibhav:
im confused, :'(
Or you could use the angle v, tanv=x/y.   ( i did not get this)

and do we draw reflected ray?
i understood till question E
but i cant do part F only.


regarding drawing softwares, currently i am searching a software that can measure pdf files, so i can do these questions without printing itself.

astarmathsandphysics:
v is the angle between the incident ray and the normal. I use trigonometry with the right angled triangle formed by the incident ray, the noraml and the card AB tanv=o/a=AB/N, where N is the normal. v is the angle of incidence and the angle of reflection is the same. You can measure this angle. OR - Since the nomal is common to incident and reflected angle, you can make a side of length 5cm at the normal where AB is and draw this line from the normal to the edge of the card.

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