FINLAND SEPTEMBER
2021
Herschel’s Experiment: descubrimiento del Infrarrojo (IR) NASE's proposal is included in the International Day of Light, which commemorates the day when a human-created laser beam was lit for the first time. It is about repeating Herschel's experiment any day between March 21 to September 23, 2021, and filling the dates the table bellow:
The Sun shone today Sept 28th, so I took a photo of the spectrum with and without an IR filter. Attached is a photo composed of both photos. I am not satisfied with the result. There is a dim area beyond red in the IR-filtered photo, but not as broad and bright I expected. Probably my camera´s own IR-blocking filter is too strong for this (all digital cameras for normal photography have an IR filter over the chip). It would be interesting to take a pair of photos like this with a camera tuned for astrophotography by changing the filter to one without IR blocking property. Note: due to the IR filter, the lower photo is false color.