VII. Fabry-Perot Interferometer When operating the Zeeman effect apparatus, Joe broke the mercury lamp that is inserted into the electromagnet. He replaced it with a hydrogen lamp that he found in storage. Instead of mercury, which has only one wavelength in the visible light range at the wavelength of 546.1 nm (green), hydrogen has four different wavelengths in the same range [410 nm (violet), 434 nm (blue), 486 nm (blue-green), and 656 nm (red)]. In his notes that he left by the Zeeman Effect apparatus, he stated, "I thought I would see four times as many rings after it was all set up properly. Now, I don't see any rings at all...and I know for a fact that all of the components of the apparatus are properly lined up. I don't know why it's not working." Underneath this note, you see more another note that states, "Shopping List: violet filter, blue filter, blue-green filter, red filter (I think this will fix it)!" Please explain what conclusion Joe may have come to based on the two statements that he left in his notes related to the Fabry Perot Interferometer Lab Activity on the Zeeman effect apparatus.

VII. Fabry-Perot Interferometer When operating the Zeeman effect apparatus, Joe broke the mercury lamp that is inserted into the electromagnet. He replaced it with a hydrogen lamp that he found in storage. Instead of mercury, which has only one wavelength in the visible light range at the wavelength of 546.1 nm (green), hydrogen has four different wavelengths in the same range [410 nm (violet), 434 nm (blue), 486 nm (blue-green), and 656 nm (red)]. In his notes that he left by the Zeeman Effect apparatus, he stated, "I thought I would see four times as many rings after it was all set up properly. Now, I don't see any rings at all...and I know for a fact that all of the components of the apparatus are properly lined up. I don't know why it's not working." Underneath this note, you see more another note that states, "Shopping List: violet filter, blue filter, blue-green filter, red filter (I think this will fix it)!" Please explain what conclusion Joe may have come to based on the two statements that he left in his notes related to the Fabry Perot Interferometer Lab Activity on the Zeeman effect apparatus.