science
Grade6
Easy
Question
In which case is the number of images formed by a single mirror is equal to the number of images formed by two mirrors placed at some angle between them?
- The angle between them is 180 degrees
- The two mirrors are constantly moved to change the angle
- The number of objects is the same
- The object should be placed close to the mirrors
Hint:
Number of images formed when angle between the plane mirrors is 180 = 1.
The correct answer is: The angle between them is 180 degrees
- Number of images formed by a single mirror is 1.
- Using formula:
- No. Of images, will be 360/180 -1 = 1(when the angle between plane mirrors is 180).
- Therefore, only 1 image is formed, which is same as the number of images formed by a single plane mirror.
- So, the correct option is a.
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