How do you use optical cable from tv to Blu-ray?

Your TV will not have a optical cable input. The easiest way is to connect an HDMI cable from the Blu-Ray player to the TV. This cable will have both the video and audio together.

If you do not have an HDMI input on your TV, use the component video output from the Blu-Ray player and the analog left and right audio to connect to the TV, or connect the optical digital output from the Blu-Ray player to a surround sound receiver for sound amplification.