II. Short Answer 1. Define Temperature. 2. What is luminous flux? 3. What do you mean by solid angle? 4. What are the factors needed for accuracy in measurement? 5. Differentiate quartz clock and atomic
Answers
Answer:
the degree or intensity of heat present in a substance or object, especially as expressed according to a comparative scale and shown by a thermometer or perceived by touch.
In photometry, luminous flux or luminous power is the measure of the perceived power of light. It differs from radiant flux, the measure of the total power of electromagnetic radiation, in that luminous flux is adjusted to reflect the varying sensitivity of the human eye to different wavelengths of light.
a three-dimensional analogue of an angle, such as that subtended by a cone or formed by planes meeting at a point. It is measured in steradians.
Four factors may affect the accuracy of pressure measurement in any of the above steps: (a) Contact time; the amount of time that the testing subject/object applied force on the pressure mat before calibratiodmeasurement is taken; (b) Contact area; the area recorded by the computer when the testing subjectjobject makes ...
Atomic clocks are actually quartz clocks—just like the ones you have at home. The difference is that an ordinary quartz clock relies purely on the oscillations of its quartz crystal to count seconds.
Explanation:
temperature is a physical quantity that expresses hot and cold. It is the manifestation of thermal energy, present in all matter, which is the source of the occurrence of heat, a flow of energy, when a body is in contact with another that is colder or hotter. Temperature is measured with a thermometer.
Answer:
temprature is heat present in the body ,