Teaching BPSC बिहार माध्यमिक TGT (9 to 10) शिक्षक भर्ती 4.0 Mock Test General Science Physics Optics
According to mirror formula, the focal length of a spherical mirror is equal to:
1
\(\frac{u v}{u-v}\)
2
\(\frac{u v}{u+v}\)
3
\(\frac{u-v}{u v}\)
4
More than one of the above
5
None of the above