Step Index and Graded Index Optical fibres 

Well taught the lecture ma’am ….teaching physics is an art … ur vedios on physics is reallllly realllllllllllllllly helpful

you remind me of a phy teacher i had 8 years ago, very nicely explained🥰

ma'am you explanation and teaching way is very good

Maam your explanation are too good. I have seen your diffraction videos. Although i have my physics exam in 2 hours than i am done with this subject but still keep making these video. They will be really helpfull for the rest to come.😊😊

So nice mam your teaching is veryy excelent that Btech lectures ❤🎉

Thank you very much. waiting for the next content madam...

Very well explained, ma'am !

A step-index fiber has a core index of refraction of n1=1.425. the cut-off angle for light entering the fiber from air is found to be 8.5 deg[for air, refractive index=1.0008] (a) What is the numerical aperture of the fiber? (b) What is the index of refraction of the cladding of this fiber ? (c) If the fiber were submersed in water, what would be the new numerical aperture and cut-off angle [for water ,refractive index=1.33]

tq so much mam

Thanks a lot mam for helping ❤✨

❤ Thanks Ma'am please ❤

Thank you mam❤

thankyou maam

tq so much mam