Question:
150 The ex of a lens material is and focal length f Due to
Last updated: 5/28/2023
![150 The ex of a lens material is and focal length f Due to](https://media.kunduz.com/media/sug-question-candidate/20200707022513730751-1745870.jpg?h=512)
150 The ex of a lens material is and focal length f Due to some chemical changes in the material its refractive index has increased by 2 The percentage decrease in focal length for u 1 5 will be 10 2 20 3 6 4 8