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होम › भौतिकी › Electromagnetic Spectrum

Electromagnetic Spectrum — Physics Questions & Practice

9 Electromagnetic Spectrum questions from Physics for competitive exams such as UPSC, Banking, SSC and Railway. Read the worked questions below, check every answer with an explanation, and track what you get wrong. का अभ्यास करें

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Electromagnetic Spectrum पर अभ्यास प्रश्न — उत्तर सहित

Try each question first, then open the answer. Explanations are included.

1. Arranged by increasing wavelength, which color of visible light has the shortest wavelength?

  1. ARed
  2. BYellow
  3. CViolet
  4. DGreen
उत्तर दिखाएँ

उत्तर: C

In the visible spectrum, violet light has the shortest wavelength (~380-450 nm), while red light has the longest (~620-750 nm).

2. Which type of electromagnetic radiation is commonly used in medical imaging to see inside the human body?

  1. AMicrowaves
  2. BInfrared radiation
  3. CX-rays
  4. DRadio waves
उत्तर दिखाएँ

उत्तर: C

X-rays, with high energy and short wavelength, can penetrate soft tissue (but not bone as easily), making them useful for medical imaging.

3. Which type of electromagnetic radiation is used in microwave ovens to heat food?

  1. AMicrowaves
  2. BRadio waves
  3. CX-rays
  4. DInfrared radiation
उत्तर दिखाएँ

उत्तर: A

Microwaves, with wavelengths between radio waves and infrared, are used in microwave ovens as they efficiently cause water molecules to vibrate, generating heat.

4. Which type of electromagnetic radiation, with wavelengths just shorter than visible violet light, can cause sunburn?

  1. ARadio waves
  2. BMicrowaves
  3. CInfrared radiation
  4. DUltraviolet (UV) radiation
उत्तर दिखाएँ

उत्तर: D

Ultraviolet (UV) radiation, with wavelengths shorter than visible light, can cause sunburn and is partially absorbed by the ozone layer.

5. Which type of electromagnetic radiation, with wavelengths just longer than visible red light, is felt as heat?

  1. AUltraviolet radiation
  2. BInfrared radiation
  3. CX-rays
  4. DMicrowaves
उत्तर दिखाएँ

उत्तर: B

Infrared radiation, with wavelengths just longer than visible red light, is commonly experienced as radiant heat.

Electromagnetic Spectrum और प्रश्न हल करें

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