Mordern Instruments Used To Measure Time Flashcards
What are modern instruments used to measure time compared to earlier devices?
Far more accurate
The development of timekeeping instruments has significantly improved accuracy over time.
What was a major step in the development of modern timekeeping instruments?
The invention of the pendulum clock
The pendulum clock revolutionized the accuracy of time measurement.
What is a pendulum clock based on?
The motion of a pendulum
A pendulum is a weight (bob) hanging from a string that swings back and forth.
What is the term for one complete to-and-fro movement of a pendulum?
One oscillation
Oscillation refers to the repetitive back-and-forth motion of the pendulum.
What is the time taken by a pendulum to make one complete oscillation called?
Time period
The time period is a crucial factor in understanding the pendulum’s motion.
What type of motion does a pendulum exhibit?
Periodic motion
Periodic motion is characterized by repeating movements after regular intervals of time.
What does the time period of a pendulum depend on?
The length of the pendulum
The pendulum’s time period remains consistent regardless of the weight of the bob and the displacement.
True or False: The weight of the bob affects the time period of a pendulum.
False
The weight of the bob does not influence the time taken for oscillations.
How does a pendulum clock indicate time?
By using the periodic motion of the pendulum to move the hands of the clock
The clock’s hands reflect the time based on the pendulum’s consistent oscillation.
What mechanism allows a pendulum clock to swing continuously?
Wound springs unwind very slowly
This mechanism ensures the pendulum remains in motion to keep accurate time.
What invention replaced pendulum clocks?
Quartz clocks
In what year were quartz crystals invented?
1927
What phenomenon occurs when quartz crystals are placed under an electric field?
Vibration
How are the vibrations of quartz crystals used in clocks?
Converted to measure time
How does the time measurement accuracy of quartz clocks compare to pendulum clocks?
Higher accuracy
Fill in the blank: Quartz clocks measure time with high _______.
accuracy
True or False: Quartz clocks were invented before pendulum clocks.
False
