Exercise Short Questions | Chapter 9 Physical Optics | Physics 11th | Balochistan Textbook Board скачать в хорошем качестве

Exercise Short Questions | Chapter 9 Physical Optics | Physics 11th | Balochistan Textbook Board

1. How can you define light? 2. Does the ether exist as proposed by Huygen for wave theory? 3. Under what condition, the spherical wave fronts are formed? 4. What is Huygen’s principle? 5. What are the conditions for interference of light? 6. How coloured fringes are obtained on soap bubble? 7. How many phenomenon are there in the favour of wave theory of light? 8. What is the cause of changing the position of bright and dark fringes in interference by thin film? 9. What is the difference between interference and diffraction? 10. How diffraction pattern is obtained on the screen by using principle of superposition? 11. Why diffraction of x-rays is possible only by a crystal? 12. What are Polaroid and polarizer? 13. How can polarized light be detected? 14. Can visible light produce interference fringes? In the young’s double slit experiment, one of the slits is covered with blue filter and other with red filter. 15. What would be the pattern of light intensity on the screen? 16. State whether the fringe width for bright and dark fringes in Young’s interference is always constant? 17. Find the grating element of the diffraction grating containing 2000 lines/cm?