Q. Mesosphere and thermosphere are collectively known as
A) Exosphere
B) Thermopause
C) Ionosphere
D) Interstellar region
Explanation
(c)
Mesosphere and thermosphere are collectively known as ionosphere as in these, gases are present in their ionised form
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.