Speed of Light - Fiber Optics

PIRA Classification: 6A01.13

Description: A circuit board pulses an LED at a fast rate. The reference signal is sent to channel 1 of a scope. A short length (15 cm) of fiber optic cable is placed between the LED and a receiver. The resulting pulse is displayed on channel 2. The 15 cm length is replaced by a 20 m length and the shift in the pulse is noted.

Special Instructions: Using the 15 cm length, line up the reference and delay pulses using the adjustment knob on the board.

Ideally For: Phys 1202, 2303, 2403H, 2503

Condition: Ok.

Setup time: 5 minutes

Safety Issues: None