Class 10 Spectrum Mock Test (ICSE)

Topics in Spectrum

• Dispersion of white light by a prism
• Electromagnetic spectrum
• Properties and uses of radiations
• Scattering of light and its effects

Spectrum practice questions with answers

1. Q1Multiple choice·1 mark
   Clouds generally appear white because the water droplets and dust particles present in the lower atmosphere:

   1. (a)scatter only shorter wavelengths like blue and violet.
   2. (b)scatter all wavelengths of white light equally.
   3. (c)refract the entire spectrum without any scattering.
   4. (d)absorb all wavelengths except white light.
   Show answer and step marks

   1. Correct option: (b) scatter all wavelengths of white light equally.+1

   Answer: (b)
2. Q2Multiple choice·1 mark
   When white light passes through a glass prism, the colour of light which deviates the least is:

   1. (a)Red
   2. (b)Violet
   3. (c)Yellow
   4. (d)Green
   Show answer and step marks

   1. Correct option: (a) Red+1

   Answer: (a)
3. Q3Multiple choice·1 mark
   Which of the following radiations is commonly used for detecting fractures in bones?

   1. (a)X-rays
   2. (b)Microwaves
   3. (c)Infrared rays
   4. (d)Ultraviolet rays
   Show answer and step marks

   1. Correct option: (a) X-rays+1

   Answer: (a)
4. Q4Multiple choice·1 mark
   Which of the following electromagnetic radiations has the highest frequency?

   1. (a)Microwaves
   2. (b)X-rays
   3. (c)Gamma rays
   4. (d)Ultraviolet rays
   Show answer and step marks

   1. Correct option: (c) Gamma rays+1

   Answer: (c)

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