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which part of the fluorescence microscope will you adjust to direct the appropriate excitation wavelengths at your specimen?

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Dichromatic beamsplitters are oriented at a 45-degree angle to the path of the excitation light entering the optical block through the reflected light fluorescence illuminator. Their primary function is to re-direct the selected excitation (shorter) wavelengths through the objective and onto the specimen.

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User Emile Pels
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