It is good idea to choose Arduino Nano 33 Sense BLE as the "Device for experimental physics teachers" (https://phyphox.org/forums/showthread.php?tid=1026)! This board has really good collection of sensors. One sensor, gesture, proximity, light color and light intensity sensor APDS9960, can determine the light color, which can be used to control this board without touching it and adding some more buttons to the pins. The programing is very easy. I tried it with some "filters" which I could found. See the code for the Arduino board and the results in the attachment.
Do not use lasers. Their direct light is too bright.
Do not use lasers. Their direct light is too bright.