PUMPA - SMART LEARNING
எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்
Book Free DemoThe amount of substance is measure of the number of entities like atoms, molecules, ions, electrons or protons, etc., present in a substance.
Generally, the amount of substance is directly proportional to the number of atoms or molecules.
Example:
The ratio of the mass of a sample by its amount of substance is the molar mass, whose SI unit is kilograms (or, more usually, grams) per mole, which is about \(18.015\) \(g/mol\) for water, \(55.845\) \(g/mol\) for iron.
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Mole is a SI unit of the amount of a substance, and it is denoted as 'mol'.
Mole is defined as the amount of substance that contains a value of \(6.023 × 10^{23}\), and its number is known as Avogadro number.
Luminous Intensity measures the power of the emitted light, by a light source in a particular direction, per unit solid angle.
Candela is an SI unit of luminous intensity, and it is denoted as 'cd'.
Photometer is a device used to measure luminous intensity.
Example:
Photometer is used in photography, soil testing, and the water industry.
Photometer
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