Match the light with its photon energy 1. Red 700nm 2. Green 500 nm 3. Blue 450

ID: 1791603 • Letter: M

Question

Match the light with its photon energy

1. Red 700nm

2. Green 500 nm

3. Blue 450 nm

4. Near ultraviolet 350 nm

5. Ultraviolet 250 nm

6. X-ray 1 nanometer (nm or 10e-9 m)

7. Gamma radiation 1 picometer (pm or 10e-12 m)

8. Infrared 100 micron (10e-6 m)

9. Microwave 1 mm

match with these answers:

a. 3.5 eV

b. 1.3 keV (kilo electron volt or 10e3 eV)

c. 4.9 eV

d. 2.8 eV

e. 2.5 eV

f. 1.2 MeV (mega electron volt or 10e6 eV)

g. 0.012 eV or 12 meV (milli-eV or 10e-3 eV)

h. 0.0012 eV or 1.2 meV (milli-ev or 10e-3)

i. 1.8 eV

(1) Photon energy, E = hc/lemda = (6.63x10^-34x3x10^8) / (700x10^-9) = 0.0284x10^-17 J = 1.77 eV = 1.8 eV

(i) is the answer.

(2) Photon energy, E = hc/lemda = (6.63x10^-34x3x10^8) / (500x10^-9) = 0.040x10^-17 J = 2.5 eV

(e) is the answer.

(3) Photon energy, E = hc/lemda = (6.63x10^-34x3x10^8) / (450x10^-9) = 0.0442x10^-17 J = 2.8 eV

(d) is the answer.

(4) Photon energy, E = hc/lemda = (6.63x10^-34x3x10^8) / (350x10^-9) = 0.0568x10^-17 J = 3.54 eV

(a) is the answer.

(5) Photon energy, E = hc/lemda = (6.63x10^-34x3x10^8) / (250x10^-9) = 0.0796x10^-17 J = 4.9 eV

(6) Photon energy, E = hc/lemda = (6.63x10^-34x3x10^8) / (1x10^-9) = 19.89x10^-17 J = 1241.4 eV = 1.3 keV

(b) is the answer.

(7) Photon energy, E = hc/lemda = (6.63x10^-34x3x10^8) / (1x10^-12) = 19.89x10^-14 J = 1241.4 x 10^3 eV = 1.2 MeV

(f) is the answer.

(8) Photon energy, E = hc/lemda = (6.63x10^-34x3x10^8) / (1x10^-6) = 19.89x10^-20 J = 0.012 eV

(g) is the answer.

(9) for this answer is (h)

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