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Electromagnetic Waves

AIPMT 2005MCQEasy📈 Topic in 38% papers+4−1
Ques. 1AIPMT 2005

If v, x and m represent the wavelengths of visible light, X-rays and microwaves respectively, then

  1. m > x > v
  2. m > v > x
  3. v > x > m
  4. v > m > x

Answer

(2) m > v > x

Solution

As per NCERT, the electromagnetic spectrum in order of decreasing wavelength is:

radio waves > microwaves > infrared > visible > ultraviolet > X-rays > gamma rays

Microwaves: 10-3 to 10-1 m

Visible light: 4 10-7 to 7 10-7 m

X-rays: 10-12 to 10-8 m

m > v > x

Answer: (2)

Keep practising — Electromagnetic Waves

Ques. 2AIPMT 2003

We consider the radiation emitted by the human body. Which one of the following statements is true?

  1. The radiation emitted is in the infra-red region
  2. The radiation emitted only during the day
  3. The radiation is emitted during the summers and absorbed during the winters
  4. The radiation emitted lies in the ultraviolet region and hence is not visible
Ques. 3AIPMT 2003

Which of the following rays are not electromagnetic waves?

  1. X-rays
  2. -rays
  3. -rays
  4. heat rays
Ques. 4AIPMT 2002

The velocity of electromagnetic wave is parallel to

  1. B E
  2. E B
  3. E
  4. B
Ques. 5AIPMT 2002

What is the cause of greenhouse effect?

  1. infra-red rays
  2. ultra violet rays
  3. X-rays
  4. radio waves.
Ques. 6AIPMT 2001

Biological importance of ozone layer is

  1. it stops ultraviolet rays
  2. ozone layer reduces greenhouse effect
  3. ozone layer reflects radio waves
  4. ozone layer controls O2/H2 ratio in atmosphere
Ques. 7AIPMT 2000

The frequency order for -rays (a), X-rays (b), UV rays (c) is

  1. b > a > c
  2. a > b > c
  3. c > b > a
  4. a > c > b

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