Question on geometrical optics

[Sanosuke Sagara]

I have my question,doubt and solution in the attachment that followed.Thanks for anybody that spend some time on this question.Sorry to say that the file format is *.zip .

 

[ehild]

I have my question,doubt and solution in the attachment that followed.Thanks for anybody that spend some time on this question.Sorry to say that the file format is *.zip .

The object distance of a real object from a lens is always positive.

By the way, is not it easier for you to draw in Paint, for example, and write in a text editor? this zipped xls file is a bit strange.

ehild

 

[quicknote]

Hello,

Thank you for sharing your question on geometrical optics. I have reviewed the attachment and have a few comments and suggestions for your solution.

Firstly, your doubt about the radius of curvature of a concave mirror is valid. It is true that the radius of curvature is always positive for a concave mirror, regardless of the sign convention. This is because the center of curvature lies on the convex side of the mirror, and the radius is measured from the center of curvature to the vertex of the mirror. Therefore, it will always be a positive value.

Secondly, your solution for finding the focal length of a concave mirror is correct. However, I would suggest including a diagram to illustrate the ray tracing method. This will make it easier for readers to understand the concept and follow your solution.

Lastly, I noticed that in your solution, you have used the sign convention where distances to the left of the mirror are positive and distances to the right are negative. While this is a valid convention, it is more commonly used to take distances to the right as positive and distances to the left as negative. I would recommend using this convention to avoid confusion.

Overall, your solution is well-explained and correct. I hope my comments and suggestions are helpful to you. Keep up the good work in studying geometrical optics!

Best regards,