X hits on this document

111 views

0 shares

0 downloads

0 comments

24 / 26

Physics  Ex-47

Question-13

The following set up consists of a light source, an obstacle, six different locations (labeled 1 to 6) and a target.

At which one of the locations can you place a plane mirror so that the light source is reflected to the target?

Click

To determine the correct location, we draw two lines from each point.

One line to the light source and another line to the target.  If both lines are unobstructed, that is the point where we place the mirror.

Note that only at location 5 can we draw unobstructed lines both to the source and to the target.

Thus, we must place the mirror at location 5.

No

No

No

No

Yes

No

We now divide the angle between the two lines at location 5 with a bisector.  This bisector will be the normal to the mirror.

  Finally, we draw the mirror perpendicular to the normal (bisector).

Mirror

If required, using a protractor, we can measure the angle of incidence or the angle of reflection.

Document info
Document views111
Page views111
Page last viewedTue Jan 24 13:21:03 UTC 2017
Pages26
Paragraphs311
Words1860

Comments