>>1869
No, it cut off >>1870

That screenshot about red light is related to some text in this book:
|title=A Self-Instructional Approach to the Physical Sciences |author=David S. Gates |ISBN-10=0-13-803536-9 |year=1975 |edition=Revised Edition |publisher=Prentice Hall |place of publication=Englewood Cliffs |main subject=physics && chemistry |format=printed book |number of parts of this work=23 chapter |language=English {number of pages=218 page |URL=https://openlibrary.org/books/OL5052310M/A_self-instructional_approach_to_the_physical_sciences