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actinometer

actinometer

9.9
A tool that measures the strength of light, like sunlight
  • noun
  • /ˌæktɪˈnɑːmɪtər/
  • Specialized
translation icon : actinómetro
  • Before modern sensors, an actinometer was commonly employed to measure the intensity of sunlight in solar research.

Examples

  • Scientists used an actinometer to determine the amount of ultraviolet radiation reaching the surface.

  • The actinometer provided precise measurements crucial for the photochemical experiment.

  • Before modern sensors, an actinometer was commonly employed in solar research.

  • The actinometer measures sunlight intensity.

  • Scientists use an actinometer to assess UV radiation.

  • Scientists used an actinometer to measure the intensity of ultraviolet radiation reaching the Earth's surface.

  • The actinometer provided accurate readings necessary for understanding the effects of electromagnetic radiation on chemical reactions.

Synonyms

radiometer
vsactinometer
  • Specialized
1 8.5

A device that measures energy from light or heat

focuses on measuring intensity via photochemical response rather than general detection
light meter
vsactinometer
  • Specialized
1 4.2

A small device that measures light to help set camera settings

measures radiation intensity for scientific use by producing a chemical change
spectrophotometer
vsactinometer
  • Specialized
1 9.9

A machine that measures how much light of different colors a substance absorbs to help know what it is

measures incoming radiation by causing a chemical change, not analyzing substances
photometer
vsactinometer
  • Specialized
1 8.6

A tool that measures how bright light is

measures radiation by triggering a chemical effect rather than optical brightness directly
fluorometer
vsactinometer
  • Specialized
1 8.9

A machine that measures the light a substance gives off when it glows

measures incoming radiation via photochemical change rather than fluorescence emission
spectroradiometer
vsactinometer
  • Specialized
9.9

A device that measures how much light there is at each color

measures overall radiation using a chemical reaction rather than spectral breakdown
radiomicrometer
vsactinometer
  • Specialized
9.9

A very sensitive device that measures tiny amounts of light or heat

uses chemical reaction measurement rather than extreme electrical sensitivity
photoelectric cell
vsactinometer
  • Specialized
4.6

A device that makes a small electric signal when light hits it to detect or measure light

registers intensity through a chemical change, not electrical conversion
luminometer
vsactinometer
  • Specialized
8.4

A machine that measures light from chemical or biological reactions

measures incident radiation intensity by causing a chemical effect, not emitted light
exposure meter
vsactinometer
  • Specialized
4.3

A tool that measures light to set camera settings

is designed to show radiation intensity through a photochemical reaction for measurement

Surface Forms

actinometer singular
actinometers plural

Morphology

actinometer = meter (semi-transparent) = actino + meter

The structure is clear as a scientific combining form plus 'meter', but the element actino- is unlikely to be known by an average B1 learner.

Etymology

The word actinometer comes from the Greek aktis meaning 'ray' and the part -meter meaning 'measure', like in thermometer. So an actinometer is literally a tool that 'measures rays' or light, which is why it is used to measure radiation and sunlight.