Why must oil be used to obtain the best resolution with a 100x lens?

Related questions

1. What is refractive index and what is absolute refractive index of the medium?
2. What is the relationship between refractive index and wavelength?
3. Which material has highest refractive index?
4. How are refractive index and wavelength related?
5. Which Colour of light is deviated least?
6. What is n1 and n2 in Snell's law?
7. Why is the refractive index important?
8. How does refractive index vary with wavelength?
9. What is n1 in Snell's law?
10. What is the formula of Snell's Law?

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1. #interface
2. #refraction
3. #glass
4. #occurring
5. #displace
6. #specimen
7. #displaces
8. #little
9. #objectives
10. #slide
11. #using
12. #light
13. #should
14. #avoids
15. #bending
16. #power