Electromagnetic Waves (VCE SSCE Physics): Quizzes

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Electromagnetic Waves
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What type of wave are electromagnetic waves?

Transverse with perpendicular E & B fields

What is the speed of electromagnetic waves in a vacuum?

3.00×108ms13.00 \times 10^8 \, \text{m} \cdot \text{s}^{-1}

In the equation c=fλc = f\lambda, what happens to wavelength if frequency increases?

Wavelength decreases proportionally

Which sequence shows EM spectrum regions in order of increasing frequency?

Radio, Microwave, IR, Visible, UV, X-ray

What is the wavelength range for visible light?

700nm700 \, \text{nm} to 400nm400 \, \text{nm}

Which EM region is used for MRI and GPS?

Radio waves

Why are shorter wavelength EM waves used for sterilization rather than communication?

Higher energy can damage and kill cells

What percentage of solar radiation reaching Earth is infrared?

48%

Convert 30GHz30 \, \text{GHz} to hertz.

3.0×1010Hz3.0 \times 10^{10} \, \text{Hz}

Who proposed that light consists of vibrating electric and magnetic fields?

James Clerk Maxwell

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