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Which of the following IR radiation is used in measuring relative humidity?

Which of the following IR radiation is used in measuring relative humidity? Correct Answer Wavelength less than 3um

IR radiation of wavelength less than 3um is used for measuring relative humidity.

Related Questions

Consider the following statements with regard to atmospheric humidity: 1. Absolute humidity is the amount of water vapour per unit volume. 2. Hygrometer is used to measure relative humidity. 3. Dew point is the temperature at which the relative humidity is 75%. Which of the above statements are correct?
Consider the following statements and choose the correct answer:
1. A direct proportionality exists between vapour pressure and the concentration of water vapour in the atmosphere
2. Relative humidity is an expression of the ratio of the actual vapour pressure of the atmosphere when saturated at the same temperature
3. A rise or fall in temperature with no change in vapour pressure will cause a drop or rise, respectively, in relative humidity
4. A rise or fall in vapour pressure with no change in temperature will be accompanied by a rise or fall, respectively, in relative humidity
High relative humidity decreases the evaporative process and as the temperature is increased, the relative humidity decreases. The comfort range for human body is the ambient temperature of 22 to 27°C with relative humidity ranging from __________ percent.
There are many instruments for measuring relative humidity. Which of the following statements are correct with respect to these devices? I. The hygrometer uses a tuft of human hair to measure relative humidity. II. Psychrometers are a pair of thermometers.
World Bank has employed major dimensions to construct measures of governance. These dimensions are:
1. Voice and Accountability - measuring political, civil and human rights
2. Instability an d violence - measuring the likelihood of violent threats to or changes in government, including terrorism
3. Government effectiveness - measuring the competence of the bureaucracy and the quality of public service delivery
4. Regulatory burden - measuring the incidence of market, unfriendly policies
5. Rule of law - measuring the quality of contract enforcement, the police, and the courts, as well as the likelihood of crime and violence
Select the correct answer:
Humidity chart is useful for the solution of problems concerning condensation, vaporisation and air conditioning. At a given dry bulb temperature, value of humidity obtained from the humidity chart directly, is in terms of __________ humidity.
The percentage humidity is less than the relative humidity only at __________ percent humidity.
If ouside air is to be conditioned from 60% relative humidity and 40 °C dry bulb temperature to 50% relative humidity and 24 °C dry bulb temperature, which psychromatic process would be required?
Relative humidity at Agra is _____________ the relative humidity at Kanpur.
Statement 1: When there is an equilibrium between the vapor pressure and the percentage relative humidity, water activity is directly proportional to the percentage relative humidity. Statement 2: Even a water activity as high as 0.85 for food items is considered to be very dry for substances.