When an object is placed between two parallel mirrors, then number of images observable are A) 2      b) 4     c) 6     d) infinite     e) none

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justaguide eNotes educator| Certified Educator

If the object were placed between ideal mirrors that reflected all the light falling on them, the two mirrors were placed in a vacuum that did not affect the passage of light in any way and it were possible to observe images that were infinitely far away, it could be said that when an object is placed between two parallel mirrors the number of images observable is infinite.

But in real life, mirrors do not reflect all the light that falls on them and light is also affected by the medium between the mirrors. Also, with each reflection the image moves further away. This makes the number of images seen of an object placed between two mirrors very large but not infinite.