Teaching BPSC बिहार माध्यमिक TGT (9 to 10) शिक्षक भर्ती 4.0 Mock Test Physics Electromagnetic Waves Reflection and Refraction
The human eye has a lens which has a :
1
Soft portion at its centre
2
Hard surface
3
Varying refractive index
4
More than of the above
5
None of the above