XII_55.Ray Optics, Combination of lenses (2013)

[@garvgoel8067]

SIR YOU ARE THE BEST TEACHER OF ALL I HAD EVER SEEN
YOU HAVE ALL THE QUALITIES OF A PREFECT TEACHER

[@ankitsingh-kw5jc]

in sec0nd case f0cal length 0f concave mirr0r will be( -R/2),in qiuesti0n 0f c0mbinati0n 0f lens and mirr0r

[@RahulKumar-hg7yd]

***** After 57:00 the radius should be -R cause its opposite to the direction of incident ray

[@aswankorula8472]

Nice explanations. Thanks. Two points....
1. At 24:00, (combination of lenses separated by distance D).....You have shown the formula for the combined focal length, but not indicated where the 'optical centre O' will be for the new 'combined' lens. Can you clarify please?
2. At 26:56, instead of saying (mu - 1), would it not be more appropriate to use (mu_lens - mu_medium)
thanks

[@garvgoel8067]

SIR IT CAN ALSO BE HAPPEN THAT PLANE MIRROR IS PLACED BEFORE FOCUS SO WHAT IS THE FINAL IMAGE

[@danishahmed1083]

best teacher of physics I salute you Sir

[@shilpiagarwal8128]

sir how focal length and radius can be same of a lens in the last question

[@reenasabharwal3927]

nive video great sir

[@pawanpanjwani7373]

sir when mirror is moved iwth certain velocity towards or away from object then how to determine what will be velocity of image sir which video of yours should is see of yours to understand it

[@swadeshsasmal7434]

If it is plane mirror then, velocity of image wrt mirror should be equal to velocity of object wrt object.....if it is spherical mirror then, velocity of image=-(v/u)^2*velocity of object

[@jagatpal1086]

Supar sir g

[@anandjadhav5496]

no sound only video playing, i.e: RAY OPTICS COMBINATION OF LENSES 2013

[@akashjoshi6111]

nice

[@MOHAMMADSALIM]

sir vehicle sound are lissen me more

[@MOHAMMADSALIM]

sir sound are not clear

[@danishahmed1083]

best teacher of physics I salute you Sir