CH # 14 Spherical Mirrors and Lenses
Light
- 1. What is Light, how does it travel?
- 2. Differentiate between reflection and refraction of light?
- 3. What is the difference between mirror and lens?
- 4. What is a plane mirror?
- 5. What do you know about regular and irregular reflection of light?
Spherical Mirrors
- 1. Define spherical mirrors?
- 2. How light reflects from spherical mirrors?
- 3. Differentiate between concave and convex mirror?
- 4. Define center of curvature and radius of curvature?
- 5. What is meant by the aperture of a spherical mirror?
- 6. Which point of a spherical mirror is called pole?
- 7. Define principle focus?
- 8. Define focal length?
- 9. Define principle axis?
- 10. Write down the relation between radius of curvature and focal length?
- 11. Write down the concave mirror formula?
- 12. Write down the convex mirror formula?
- 13. Which quantities are taken as positive and negative in formula?
- 14. What is the difference between real and imaginary image?
- 15. For which mirror focal length is positive and for which it is negative?
- 16. Define linear magnification, and derive its relation?
- 17. Write down some uses of spherical mirrors.
- 18. Why convex mirrors are fixed at the blind turns on the roads of mountains?
Glass Instruments
- 1. What is the difference between a glass slab and a mirror?
- 2. Write down the laws of refraction of light?
- 3. What is meant by real and apparent depth?
- 4. What is meant by refractive index?
- 5. What is Snell’s law?
- 6. How to find the refractive index by speed of light?
- 7. What is meant by the critical angle?
- 8. Derive a relation between refractive index and critical angle?
- 9. Define total internal reflection and write its conditions?
- 10. What is meant by mirage (reflection of plane on the runway)?
- 11. What is a prism?
- 12. What is meant by angle of deviation?
- 13. What is meant by angle of minimum deviation?
- 14. Define totally reflecting prism?
- 15. What is a periscope, how does it work?
- 16. What is a prism binocular?
- 17. What is an optical fiber?
- 18. On which principle does optical fiber work?
- 19. How does light pass through an optical fiber?
- 20. What is a light pipe?
- 21. What are the advantages of light pipe?
- 22. Define endoscope; write in brief about its different types?
Rainbow
- 1. What is a rainbow?
- 2. By which phenomenon of light rainbow is seen?
- 3. Write down the conditions to view a rainbow?
- 4. What is meant by solar spectrum?
- 5. What is the basic reason of formation of rainbow?
- 6. Differentiate between primary and secondary rainbow?
- 7. Write down the order of colours in the primary rainbow?
- 8. Write down the order of colours in the secondary rainbow?
Lenses
- 1. What is a lens?
- 2. Define linear magnification of lenses?
- 3. Derive a relation of linear magnification for lens?
- 4. For which lens real image is formed?
- 5. For which lens erected image is formed?
- 6. What is meant by a compound lens?
- 7. Define power of lens?
- 8. What is the unit of power of lens?
- 9. When does the power of lens is positive and when it is negative?
- 10.
Aberrations of Lenses
- 1. Define aberration?
- 2. What is meant by spherical aberration?
- 3. Which rays of light are known as “Marginal rays”?
- 4. Which rays of light are known as”Paraxial rays”?
- 5. How to minimize spherical aberration?
- 6. What is meant by chromatic aberration?
- 7. What is the basic reason of chromatic aberration?
- 8. How to minimize chromatic aberration?
- 9. What is meant by “Achromatic lens”?
Defects of Vision
- 1. What is the minimum distance of vision for normal eye?
- 2. Define short sightedness?
- 3. What is the basic reason of short sightedness?
- 4. How to minimize the short sightedness?
- 5. Define long sightedness?
- 6. What is the basic reason of long sightedness?
- 7. How to minimize the long sightedness?
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