Q. Instrument for measuring blueness of the sky or ocean is called ________
✅ Correct Answer: (C)
Cyanometer
Explanation: A cyanometer (from cyan and -meter) is an instrument for measuring "blueness", specifically the colour intensity of blue sky.
Explanation by: Team MCQ Buddy
A cyanometer (from cyan and -meter) is an instrument for measuring "blueness", specifically the colour intensity of blue sky.