337Part 3 is 90°
What will be the angle of deviation produced by two mirrors when they are placed
1. parallel to each other
2. perpendicular to each other
3. at an angle of 45° to each other
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22 Answers
337Thanx a lot! I got it. But see the image.
In the 1st pic 180° is the angle. But on drawing the ray diagram, it looks more like 360°. If we omit the violet ray and bring the red and black rays closer, it will look as if the ray (black) came towards the mirrors and turned in the opposite direction (360°) and then it goes back (red)... is it not?
Thanx again...
206I hope the following helps.......
Only when angle becomes equal to 180°, does this become a straight line........and the rays point in opp. directions.....
206its pi..... :)
and its evident from the figure!!
- Sayan Sinha When lines are parallel and are in the opposite directions, how can the angle between them be 180 degrees?Upvote·0· Reply ·2013-06-12 00:48:38
206if they point in opp. directions, how come angle between them is 360°?
206So, the angle contained by them cannot be zero....it can only be...........?????
206Yes, the incident and reflected ray are parallel to each other, but this is a ray.....do the rays also point in the same direction?
337In part 2, are the incident ray and the final reflected ray parallel to each other? Is the answer 0° again?
337What is angle of deviation? Is it angle of incidence + angle of reflection? If so, then is part (i) 2 x the angle of incidence?
Thanx...
206yes, part 1 is obviously 0°.......
evaluate part 2 and 3.....
- Sayan Sinha Do we have to represent the values in terms of i ?
- Sayantan Hazra If you correctly evaluate, the value will not depend on i.....
337part 3 is: 45 -i...
- Sayantan Hazra Show how you are evaluating this....
337So, is the answer of part 1: 0° ?
- Sayan Sinha Because they are parallel...
337
Is it angles a+c? Or is it angles b+d? Or is it something else?
Thanx...
206this is a case of mirrors placed parallel to each other........if you name it in sequence as ray 1, ray 2 and ray 3, then the angle between ray 1 and ray 3 is the angle of deviation.......
206Angle of deviation, for two mirrors means the angle between the incident ray on mirror 1 and reflected ray from mirror 2........