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Place an aperture in the front of the ray box to produce several parallel rays.

ID: 1615990 • Letter: P

Question

Place an aperture in the front of the ray box to produce several parallel rays. Aim the set of parallel rays into the center of the outside curve of a semi-circular curved mirror. Record the incident and reflected rays. Trace the outside reflecting surface of the convex Remove the mirror and trace the reflected rays back to the point that they seem to come from. This point is the focal point of the mirror. (Since the rays do not actually converge at this point it is called a virtual focal point.) Using the same technique as above, determine the radius of curvature of your mirror. Measure the focal length of your mirror and compare it to the radius. How does the focal length compare with the focal length of the concave side of the mirror? How does it compare with the radius of curvature of the mirror found previously? By how much do the results differ? (Expressing your result as a percent might be helpful.) Can this amount be related to the mirror construction? Suggest why convex mirrors are used as rear vision mirrors in cars.

Explanation / Answer

6. Both convex and concave mirrors have a focal length f=R/2. Since the radius of the mirrors are same, so the two focal lenghts will be essentially the same

7.Please mention what "previously" actaully is.

8. Same here. previous experiment is missing.

9. Convex mirror always produces a virtual and diminished image and hence a wider field of view. This is the reason why they are used as rear view mirrors of cars.