Question on: SS1 Physics - Introduction To Physics And Measurement
Which of the following is an example of a non-contact measuring technique?
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A
Caliper
B
Stopwatch
C
Infrared thermometer
D
Weighing scale
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Correct Option: C
The correct answer is C, Infrared thermometer, because it measures temperature without physically touching the object.
* **Caliper:** Requires direct contact to measure dimensions.
* **Stopwatch:** Measures time, which doesn't relate to contact or non-contact.
* **Infrared thermometer:** Measures temperature by detecting infrared radiation emitted by an object.
* **Weighing scale:** Requires direct contact to measure mass.
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