Test ℝℯмøтℯ control using mobile camera

This is a simple trick for identifying infrared signals using a mobile phone having camera.
We can check Infrared  Remote controls by using this method. For this,
1.Start your mobile camera
2.Turn it to Infrared signal source
3.Start the Infrared activity(press your remote button) ........Surprisingly we can see a white light coming from the infr. source..
Many people use this trick for checking remotes and other equipments when IR checker is not available.