Which property is used to make invisible handwriting visible?
Question and options
Which property is used to make invisible handwriting visible?
- effervescence
- fluorescence
- refraction
- None of the given options is correct
Answer and explanation
Correct answer: B - fluorescence
Invisible/secret writing is usually made visible under UV light, exploiting fluorescence. Effervescence is gas release in a chemical reaction and refraction is the bending of light, neither of which reveals hidden writing.
Practice for these exams
-
CUSAT CAT M.Sc. Forensic Science
-
CUET PG Law (LL.M.)
Subject revision