The frequency of light having wavelength 3×10 cm is
Correct answer: D. 1 x 10^13
- A. 1x10
- B. 3.0 x 10^7
- C. 1x10¹0
- D. 1 x 10^13
Explanation
We know that v = f λ v --- = f λ (placing values) 3 × 10⁸ f = ------------------ 3 × 10⁻³ × 10⁻² f = 1 × 10¹³
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About Electromagnetic Waves
Electromagnetic waves consist of mutually perpendicular, oscillating electric and magnetic fields that also remain perpendicular to the direction of propagation. They travel through vacuum at the speed of light and include radio waves, microwaves, infrared, visible, ultraviolet, X-rays and gamma rays. Unlike mechanical waves, they do not require a material medium.
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