Question

The device used to measure light intensity is known as: a) Lux metre b) Ampere meter c) Voltmeter d) Galvanometer

Answer 1

correct answer is Lux Metre
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Answer 2

The device used to measure light is known as Lux meter(option a)

• The lux meter is a device that is used to measure illuminance.
• The derived SI unit of illuminance is lux
• It is used to measure the luminous flux per unit area.
• It is used as a measure of the intensity of light that hits a surface or passes by it.
• It measures how much luminous flux is spread over a specific area.
• The word lux is derived from a Latin word that means light