SELF-ASSESSMENT TEST
Subject Experts Science Solutions for Exercise - SELF-ASSESSMENT TEST
Simple step-by-step solutions to SELF-ASSESSMENT TEST questions of Human Eye and Colourful World from Xamidea COMPLETE COURSE SCIENCE Class X. Also get 3D topic explainers, cheat sheets, and unlimited doubts solving on EMBIBE.
Questions from SELF-ASSESSMENT TEST with Hints & Solutions
A prism ABC (with BC as base) is placed in different orientations. A narrow beam of white light is incident on the prism as shown in figure. In which of the following cases after dispersion does the third colour from the top correspond to the colours of the sky?
What is "dispersion of white light"? Draw a labelled diagram to illustrate the recombination of the spectrum of white light. Why is it essential that the two prisms used for the purpose should be identical and placed in an inverted position with respect to each other?
Give reasons: The sky appears dark instead of blue to an astronaut in space.
Give reasons: The sky near the horizon appears to have a reddish hue at the time of sunset and sunrise.
Give reasons: The stars appear to twinkle.
Write the functions of each of the following parts of the human eye:
- Cornea
- Iris
- Crystalline (Eye) lens
- Ciliary muscles
- Retina
A person is unable to see distinctly the objects closer than . Name the defect of vision he is suffering from. Draw ray diagrams to illustrate the cause of the defect and its correction by suitable lens.
A person is unable to see distinctly the words printed on a newspaper. Name the defect of vision he is suffering from. Draw ray diagram to illustrate this defect. List its two possible causes. Draw a ray diagram to show how this defect may be corrected using a lens of appropriate focal length.
