Functions of the two filters used in floresence microscopy

Exciter filters permit only selected wavelengths from the illuminator to pass through on the way toward the specimen. Barrier filters are filters which are designed to suppress or block (absorb) the excitation wavelengths and permit only selected emission wavelengths to pass toward the eye or other detector

Explanation:

because they are eaten by the frog and the frog getseaten by the snake and the snake by the eagle

the sun's light combined with the visible wavelenghts form what is called ultraviolet radiation, which are the long waves at the end of a visible light sprectrum.

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