× The Pauli Exclusion Princ x /takeAssignment/takeCovalentActivity.do?locator-as

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× The Pauli Exclusion Princ x /takeAssignment/takeCovalentActivity.do?locator-assignment-take&takeAssignmentSess; orks of Worlc Bookshelf Online: Eq Q Biological Principles Q Biodiversity Exam 1F Q [Review Topics] Use the References to access important values if needed for this que Infrared radiation falls in the wavelength region of 1.00x106 to 1.00x10 meters. What is the energy of infrared radiation that has a wavelength of 4.77x104 m? Energy- kJ/photon Submit Answer Retry Entire Group 8 more group attempts remaining

Explanation / Answer

The energy associated with radiation is given by,

E = h.c/Lambda where h = plank's constant = 6.626 x 10-34 J s , c= speed fo light = 3x108 m/s , lambda = wavelength

E = 1.98 x 10-16 / lambda (nm) [ 1 ev = 23.06 kcal/mol = 96.48 kJ/mol = 1.6 x 10-19 J/molecule(J/photon)]

1) Wavwlength of radiation = 4.77 x 10-4 m = 4.77 x 10-4 x 109 nm = 4.77 x 105nm

Energy = 1.98 x 10-16 / 4.77 x 105 = 0.415 x 10-21J / photon = 0.415 x 10-24 kJ/photon

2) wavelength of blue light = 478 nm

Energy = 1.98 x 10-16 / 478 nm = 0.414 x 10-18 J/photon = 0.414 x 10-21kJ/photon

3) Wavwlength of radiation = 5.62 x 10-4 m = 5.62 x 10-4 x 109 nm = 5.62 x 105nm
Energy = 1.98 x 10-16 / 5.62 x 105 = 0.352 x 10-21J / photon = 0.352 x 10-24 kJ/photon

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