Tiwari Academy Discussion

Asked: December 30, 2020In: Class 10 Science

Write the importance of ciliary muscles in the human eye. Name the defect of vision that arises due to gradual weakening of the ciliary muscles. What types of lenses are required by the person suffering from this defect to see the objects clearly.

NCERT Solutions for Class 10 Science Chapter 11 Important Board Questions Human Eye and Colourful World NCERT Books for Session 2022-2023 CBSE Board and UP Board Short Questions Questions No: 7

Physics Question

Asked: December 30, 2020In: Class 10 Science

What is “dispersion of white light”? Draw a labelled diagram to illustrate the recombination of the spectrum of white light. Why it is essential that the two prisms used for the purpose should be identical and placed in an inverted position with respect to each other?

NCERT Solutions for Class 10 Science Chapter 11 Important Board Questions Human Eye and Colourful World NCERT Books for Session 2022-2023 CBSE Board and UP Board Short Questions Questions No: 5

Physics Question

Asked: December 29, 2020In: Class 10 Science

(A) Student is unable to see clearly the words written on the black board placed at a distance of approximately 3 m from him. Name the defect of vision the boy is suffering from. State the possible causes of this defect and explain the method of correcting it. (b) Why do stars twinkle? Explain.

NCERT Solutions for Class 10 Science Chapter 11 Important Board Questions Human Eye and Colourful World NCERT Books for Session 2022-2023 CBSE Board and UP Board Long Short Questions Questions No: 3

Physics Question

Asked: December 29, 2020In: Class 10 Science

What is atmospheric refraction what causes atmospheric refraction?

NCERT Solutions for Class 10 Science Chapter 11 Important Board Questions Human Eye and Colourful World NCERT Books for Session 2022-2023 CBSE Board and UP Board Long Short Questions Questions No:1

Physics Question

Asked: December 29, 2020In: Class 10 Science

With the help of scattering of light, explain the reason for the difference in colours of the Sun as it appears during sunset/sunrise and noon.

NCERT Solutions for Class 10 Science Chapter 11 Important Board Questions Human Eye and Colourful World NCERT Books for Session 2022-2023 CBSE Board and UP Board Short Questions Questions No: 6

Physics Question

Asked: December 28, 2020In: Class 10 Science

Draw a neat labelled ray diagram of the experimental set-up for observing the scattering of light in a colloidal solution of sulphur to show how the sky appears blue and the sun appears red at sunrise and sunset.

NCERT Solutions for Class 10 Science Chapter 11 Important Board Questions Human Eye and Colourful World NCERT Books for Session 2022-2023 CBSE Board and UP Board Long Short Questions Questions No: 2

Physics Question

Asked: December 28, 2020In: Class 10 Science

(a) A student suffering from myopia is not able to see distinctly the object placed beyond 5 m. List two possible reasons due to which this defect of vision may have arisen. With the help of ray diagrams explain. (i) Why the student is unable to see distinctly the objects placed beyond 5 cm from his eyes. (ii) The type of the corrective lens used to restore proper vision and how this defect is correct by the use of this lens. (b) If, in this case, the numerical value of the focal length of the corrective lens is 5 m, find the power of the lens as per the new Cartesian sign convention.

NCERT Solutions for Class 10 Science Chapter 11 Important Board Questions Human Eye and Colourful World NCERT Books for Session 2022-2023 CBSE Board and UP Board Long Short Questions Questions No: 5

Physics Question

Asked: December 28, 2020In: Class 10 Science

(a) Write the function of each of the following parts of human eye: (i) Cornea (ii) Iris (iii) Crystalline (iv) Ciliary muscles (b) Why does the sun appear reddish early in the morning? Will this phenomenon be observed by an astronaut on the Moon? Give reason to justify your answer.

NCERT Solutions for Class 10 Science Chapter 11 Important Board Questions Human Eye and Colourful World NCERT Books for Session 2022-2023 CBSE Board and UP Board Long Short Questions Questions No: 4

Physics Question

Asked: December 28, 2020In: Class 10 Science

Which light has longer wavelength red light or blue light?

NCERT Solutions for Class 10 Science Chapter 11 Important Board Questions Human Eye and Colourful World NCERT Books for Session 2022-2023 CBSE Board and UP Board Very Short Questions Questions No: 5

Physics Question

Asked: December 28, 2020In: Class 10 Science

State two effects produced by the scattering of light by the atmosphere.

NCERT Solutions for Class 10 Science Chapter 11 Important Board Questions Human Eye and Colourful World NCERT Books for Session 2022-2023 CBSE Board and UP Board Very Short Questions Questions No: 3

Write the importance of ciliary muscles in the human eye. Name the defect of vision that arises due to gradual weakening of the ciliary muscles. What types of lenses are required by the person suffering from this defect to see the objects clearly.

What is “dispersion of white light”? Draw a labelled diagram to illustrate the recombination of the spectrum of white light. Why it is essential that the two prisms used for the purpose should be identical and placed in an inverted position with respect to each other?

(A) Student is unable to see clearly the words written on the black board placed at a distance of approximately 3 m from him. Name the defect of vision the boy is suffering from. State the possible causes of this defect and explain the method of correcting it. (b) Why do stars twinkle? Explain.

What is atmospheric refraction what causes atmospheric refraction?

With the help of scattering of light, explain the reason for the difference in colours of the Sun as it appears during sunset/sunrise and noon.

Draw a neat labelled ray diagram of the experimental set-up for observing the scattering of light in a colloidal solution of sulphur to show how the sky appears blue and the sun appears red at sunrise and sunset.

(a) Write the function of each of the following parts of human eye: (i) Cornea (ii) Iris (iii) Crystalline (iv) Ciliary muscles (b) Why does the sun appear reddish early in the morning? Will this phenomenon be observed by an astronaut on the Moon? Give reason to justify your answer.

Which light has longer wavelength red light or blue light?

State two effects produced by the scattering of light by the atmosphere.

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