Teaching BPSC बिहार मध्य विद्यालय (6 to 8) शिक्षक भर्ती 4.0 Mock Test Physics Optics Refraction and Reflection
Fibre optics cable used in communication works on the principle of
1
regular reflection of light
2
total internal reflection of light
3
refraction of light
4
More than one of the above
5
None of the above