which one of the property is true for mirror
1-refraction
2-refletion
3-communication
4-measuring length
5-gravity
6-heating object
Mirrors operate by reflecting light. They can be used to heat objects. In Boy Scouts, we were taught to communicate with them. A mirror on the moon together with a laser can be used to measure distance.
The universal constant of gravity was measured with a mirror.
You have been given an odd set of choices.