A3 bladed fan is spinning at 16.7 revs/sec in a very dark room. If a flashing light (called a strobe light) flashes at just the right frequency, the spinning blades look motionless. What is the shortest time, in seconds, between flashes that will make the fan appear to be stopped?

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01)
A 3 bladed fan is spinning at 16.7 revs/sec in a very dark room. If a flashing light (called
a strobe light) flashes at just the right frequency, the spinning blades look motionless.
What is the shortest time, in seconds, between flashes that will make the fan appear to be
stopped?
Transcribed Image Text:01) A 3 bladed fan is spinning at 16.7 revs/sec in a very dark room. If a flashing light (called a strobe light) flashes at just the right frequency, the spinning blades look motionless. What is the shortest time, in seconds, between flashes that will make the fan appear to be stopped?
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