NCERT Class XII Chapter
Electromagnetic Waves
Questions With Solutions
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Question : 3
Total: 15
What physical quantity is same for X-rays of wavelength 10 – 10 m, red light of wavelength 6800 Å and radio waves of wavelength 500 m?
Solution:
Though they all have different wavelengths and frequencies, but they have same speed i.e., speed of light 3 × 10 8 m s – 1 in vacuum
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