Short Response Questions | Chapter 14 Optics | 10th Physics NBF | New Book | FBISE

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Chapter 10: Heat Capacity & Modes of Heat Transfer
   • CH10: Heat Capacity & Modes Of Heat Transfer  
Chapter 11: Thermal Transformations
   • CH11: Thermal Transformations  
Chapter 12: Waves
   • CH12: Waves  
Chapter 13: Sound
   • CH13: Sound  
Chapter 14: Optics
   • CH14: Optics  

1. Why is the index of refraction always greater than or equal to unity?
2. Which physical process is responsible for the decrease In the speed of light in material medium?
3. How powder takes the shine off of a person’s nose?
4. Why an object in water always appears to be elevated to its real depth?
5. Refractive index of air is lower for air at high temperatures, explain.
6. Rainbow forms due to dispersion of light by the rain drops suspended in air. How double rainbow form? Can a triple rainbow be formed?
7. Can you photograph a virtual image? Explain.
8. What is meant by the negative magnification?
9. Can a flat transparent glass be considered as a lens of infinite focal length? If yes, where does it form an image?
10. If we dip a lens in water what would happened to its focal length? Elaborate?
11. When you open your eyes in water why the things look blurry?
12. Evaluate the statement that “ a real image is always inverted”?
13. Argue about the nature of gravitational lensing as optical or not?
14. Inspect the reason for the curved ceilings of school halls?
15. Propose a reason for producing more sound by an empty container as compared to a filled one.