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Chemistry CBSE Live product
Class 9 (2026-27)
Earth as a system: Energy, Matter and life
Earth's Interconnected Spheres & Solar Energy
5.
Electromagnetic radiation
Question:
2
m.
Find
the correct answer for the
given
questions:
1.
What is the approximate speed of electromagnetic waves in vacuum?
\(3\ ×\ 10 ^{6} \ m/s\)
\(3\ ×\ 10 ^{9} \ m/s\)
\(3\ ×\ 10 ^{7} \ m/s\)
\(3\ ×\ 10 ^{8} \ m/s\)
2.
Which of the following is a greenhouse gas mentioned in the given content?
Oxygen
Nitrogen
Helium
Carbon dioxide
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