ICSE Worksheet for chapter-8 Spectrum class 10

ICSE Worksheet for chapter-8 Spectrum class 10

Worksheet For class 10

This page is prepared by the Academic team of Physics Wallah which consists of ICSE Board Worksheet for Class 10 Physics . Students of Class 10 Physics can get a free Worksheet for Class 10 Physics in PDF format prepared as per the newest syllabus and examination pattern in your schools.

Standard 10 students can practice questions and answers which are given here for Physics in Grade 10 that will help them to improve their knowledge of all important chapters and their topics. Students can also download free pdf of Class 10 Physics Notes prepared by teachers and solve important problems provided here with solutions on daily basis to get more scores in school exams and tests.

If any students need to take the online test to check their concepts or undertstanding then they can visit Physics Quiz for Class 10 .

Summary

• Refraction through a prism, Dispersion of light, Recombination of spectrum
• Electromagnetic Spectrum – Classification and Properties
• Scattering of light and its applications
• Tyndall Effect, Effects of scattering

Section 1 - Objective

Q1. When a white light ray falls on a prism, the ray at its first surface suffers:

1. Only refraction
2. Only dispersion
3. Only deviation
4. Both deviation and dispersion

Q2. In the spectrum of white light by a prism, the colour at the extreme end opposite to the base of prism is:

1. Violet
2. Yellow
3. Red
4. Blue

Q3. Which of the following is correct?

1. λ _blue >λ _yellow >λ _green
2. λ _yellow > λ _green > λ _blue
3. λ _yellow > λ _blue >λ _green
4. λ _green > λ _blue >λ _yellow

Q4. A radiation X is focused by a proper device on the bulb of a thermometer due to which mercury in it shows a rapid increase. The radiation X is:

1. Infrared radiation
2. Visible light
3. Ultraviolet radiation
4. X-rays

Q5. The wavelength range of visible part of electromagnetic spectrum is:

1. 800 to 10 ⁷ Ǻ
2. 4000 to 8000 Ǻ
3. 100 to 8000 Ǻ
4. 100 to 4000 Ǻ

Q6. Blue colour of sky is due to

1. Dispersion of light
2. Scattering of light
3. Refraction of light
4. Reflection of light

Q7. Rainbow is formed due to

1. Reflection and dispersion of light through the water droplets
2. Total internal reflection, refraction and dispersion of light through the water droplets
3. Only dispersion of light
4. Only refraction of light

Q8. Dispersion of light by a prism is due to the change in:

1. Frequency of light
2. Speed of light for different colours
3. Scattering
4. None of these

Q9. In white light of sun, maximum scattering by the air molecules present in the earth’s atmosphere is for:

1. Red colour
2. Yellow colour
3. Green colour
4. Blue colour

Section 2 - Subjective

• Q1. Explain the cause of dispersion of white light through a prism
• Q2. Calculate the frequency of yellow light of wavelength 5500Ǻ. The speed of light is 3x 10 ⁸ ms ^-1
• Q3. Name three properties of ultraviolet radiation which are similar to visible light
• Q4. What is meant by scattering of light?
• Q5. How does not intensity of scattered light depend on the wavelength of incident light? State conditions when this dependence holds
• Q6. The cloud are seen white. Give reason?

Solutions for Section 1 & 2

Subjecti​ve:

2. .5.45×10 ¹⁴ H ₃