Question

for convex mirror mirror f=5cm,u=10,v=3.3cm as per sign convention rule which is correct.
a)f=5cm,u=10cm,v=3.3cm
b)f=-5cm,u=-10cm,v=-3.3cm
c)f=5vm,u=-10cm,v=3.3cm
d)f=-5cm,u=-10cm,v=3.3cm​

Answer 1

Explanation:

according to the sign convention rule

f=-5,u= - 10, v = +3.3

so, option 'D' is correct

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Answer 2

Answer:

The correct option for this question is c)f=5vm,u=-10cm,v=3.3cm.

Explanation:

In a convex mirror, the focal length, image distance, and object distance are all positive. Since the image in a convex mirror is always produced on the right side (behind the mirror), the image distance (o) will always be positive. The radius of curvature and focal length is interpreted as + (positive) in the case of the convex mirror since the center of curvature and focus are located behind the convex mirror. Images always develop behind a convex mirror, hence the distance of the image is interpreted as being positive. Virtual pictures are always created by convex mirrors. This is due to the fact that the convex mirror's focal point and center of curvature are both fictitious positions that are out of reach.

Thus, the sign convention states that the focal length of a convex lens is positive while the focal length of a concave lens is negative.