Measurement of Time Flashcards
Ticker-timer and light gates
1
Q
Describe the ticker-timer.
A
Works using a.c current
a.c is current/voltage that oscillates/vibrates repeatedly
Frequency 50Hz or 50 vibrations/sec
Time for 1 oscillation = 0.02s
2
Q
Describe light gates.
A
2 gates - two disturbances - one for start, one for finish
1 gate - starts when broken, stops when reconnects