| Author |
Message |
![[Post New]](/templates/default/images/icon_minipost_new.gif) 12 May 2007 12:23:37 IST
|
|
|
ray of light strikes a horizontal plane mirror at an angle of 45' .a second plane mirror is arranged at an angle  with it .if the ray after reflection form the second goes horizontally parallel to the first mirror ,then thita is (1) 45 (2) 60 (3)67.5 (4) 135
|
|
|
|
12 May 2007 12:40:18 IST
|
|
|
I think its 60 degrees.
|
Ken
From: UNITED STATES, Green Bay, Wisconsin
 |
this reply: 0 points
(with 0 
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
14 May 2007 02:02:48 IST
|
|
|
i think it is 67.5degree.
|
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
14 May 2007 02:05:29 IST
|
|
|
if the ray is parallel to horizontal then i + r = 45 on 2nd mirror. & theta = 90 - r.
|
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
14 May 2007 10:19:21 IST
|
|
|
yaar the situation is as given in figure!!!
 CBF = 450
so GCB = 1350 (using concept of || lines)
so BCA = 22.50
ABC = 1350
so BAC =  = 22.50
pls rate me if crrect
|
 
Being beaten is often a temporary condition, giving up is what makes it permanent. |
this reply: 2 points
(with 0
in 1 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
15 May 2007 12:36:19 IST
|
|
|
sum 1 pls verify my answer
|
Being beaten is often a temporary condition, giving up is what makes it permanent. |
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
16 May 2007 11:26:06 IST
|
|
|
Right answer raman
|
Krishna Gopal Singh
B.Tech Chemical Engg
IIT Delhi 2002
Currently doing PhD from IIT Delhi |
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
16 May 2007 13:44:48 IST
|
|
|
thnk u sir
|
Being beaten is often a temporary condition, giving up is what makes it permanent. |
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
|
|
Moderation Team
![[Up]](/templates/default/images/icon_up.gif "[Up]"){kind=icon}
2
