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Question 35

Which row in the table correctly identifies a region of the electromagnetic spectrum, a typical wavelength of radiation in that region, and the corresponding energy of a single photon of that wavelength in a vacuum?

Spectral RegionWavelength / mPhoton Energy / JAInfrared2.5×10−68.0×10−20BUltraviolet1.5×10−74.4×10−27CX-ray8.0×10−72.5×10−19DMicrowave5.0×10−34.0×10−25 \begin{array}{|c|c|c|c|} \hline & \text{Spectral Region} & \text{Wavelength / m} & \text{Photon Energy / J} \\ \hline \text{A} & \text{Infrared} & 2.5 \times 10^{-6} & 8.0 \times 10^{-20} \\ \hline \text{B} & \text{Ultraviolet} & 1.5 \times 10^{-7} & 4.4 \times 10^{-27} \\ \hline \text{C} & \text{X-ray} & 8.0 \times 10^{-7} & 2.5 \times 10^{-19} \\ \hline \text{D} & \text{Microwave} & 5.0 \times 10^{-3} & 4.0 \times 10^{-25} \\ \hline \end{array} ABCD​Spectral RegionInfraredUltravioletX-rayMicrowave​Wavelength / m2.5×10−61.5×10−78.0×10−75.0×10−3​Photon Energy / J8.0×10−204.4×10−272.5×10−194.0×10−25​​
A

Row A

B

Row B

C

Row C

D

Row D

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