Choose the option that best completes the analogy:
Speedometer : Speed :: Lux meter : ?
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → Light intensity
Given pair: Speedometer : Speed → instrument : what it measures (a speedometer measures the speed of a vehicle)
| Pair | Relationship |
|---|---|
| (1) Lux meter : Wattage | wrong instrument (wattage, the electric power a device uses, is measured with a wattmeter) |
| (2) Lux meter : Loudness | wrong instrument (loudness of sound is measured in decibels with a sound level meter) |
| (3) Lux meter : Colour | not a measurement (colour is the shade our eyes see, such as red, blue or green) |
| (4) Lux meter : Light intensity (answer) | instrument : what it measures (light intensity is how much light falls on a surface) |