In this tutorial I will show you how to see infrared light easily using ur iPhone the iphone im using is a iphone 5 but it should work on the iPhone 4 as well its a very fun little trick

Step 1: Open Camera

Open camera then select any of the camera features just make sure the colours are normal then switch it to the front camera

Step 2: Get Your TV Controller

Next you will need to get a tv controller or any controller with a infrared light and point it at the camera

Step 3: Press Any Botton

Next you will need to press any Botton on your controller make sure you do this away from your TV or the devise the controller controls so it won't interfere with it then u should see a blueish or purplish colour coming form the infrared LED

Step 4: Enjoy :)

Enjoy the fun trick and as u may see it reales the light in a frequency that's how the TV distinguishes the controls for example when u press some bottons beep faster than others I hope u enjoyed this and learn some interesting things and enjoy