FIX THIS: Infrared lamps are used in restaurants and cafeterias to keep food warm. The infrared radiation is strongly absorbed by water, raising its temperature and that of the food... if the wavelength of infrared radiation is assumed to be 1500mm, then the number of protons per second of infrared radiation is produced by an infrared lamp that consumes energy of the rate of 100 watt and is 12% efficient will be:
Correct answer: B. 9 x 10^19
- A. 4 x 10^10
- B. 9 x 10^19
- C. 11 x 10^12
- D. 15 x 10^4
Explanation
The correct option is B.Consider E= hc/lamdaWhere, E= energy per photonh= Planks constant= 6.626-34 J/sec.c = speed of light = 3 x 108 m/sE = hc/lamda E = hc/ 1500mm0.12 x 100= n x 6.6 x 10-34 x 3 x 108/1500 x 1019n= 9 x 1019.As it is a numerical, so i has only one answer.
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Industrial chemistry applies chemical reactions and material properties to the manufacture of adhesives, dyes and polymers. Coverage includes addition and condensation polymerisation, thermoplastics and thermosetting polymers, the structural basis of colour in dyes, and how adhesive composition enables bonding between surfaces.
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