A concave mirror is studied in a lab

PHYSICS · Subjective · CBSE · Physics · Light — Reflection and Refraction · Light — Reflection and Refraction

Problem

A concave mirror is studied in a lab. The measured quantities are • object distance

s_o = (25.0 \pm 0.2)\,\text{cm}

• object height

h_o = (2.00 \pm 0.05)\,\text{cm}

• image height

h_i = (-6.50 \pm 0.10)\,\text{cm}

(negative sign indicates inversion) Calculate the focal length of the mirror and its absolute uncertainty, reporting the result in the form

f \pm \Delta f

in centimeters.