Class 11 Physics | Stationary Waves And Beats | #10 Phase Change in Reflection of Waves | JEE & NEET

PG Concept Video | Stationary Waves And Beats | Phase Change in Reflection of Waves by Ashish Arora
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[@vijayvyas5075]

Sir I am not very much clear about phase difference. I am quite confused about this concept. Please help me out

[@rafiahmed3339]

thanks sir.

[@maplecyrupx]

beautifully explained!

[@tpsicmin]

Thanks A Lot Sir ❤❤❤❤

[@gentleman3258]

Very nice

[@alphaiitd1]

Thanks sir

[@arjunpandey6540]

can we apply same logic for explaining the phase change of reflected wave in longitudinal pressure waves sir???its really confusing me..

[@mohaksharma7658]

Sir, if there is a string with free end ( like |__/\__.) and wave is moving towards right and then reflecting from free end, in this case what should we take v2 equal to? ( I first thought zero but that will imply that wave will get inverted after reflection which is not true).. Plz help Sir..

[@targetiitbcse1761]

v2 will be the velocity of the medium that is beyond the reflecting boundary

[@surajkumarbehera]

sir at 2:13 as V2

[@tussulegend2641]

Tum optical densuty aur nornal density ko merge kr rhe ho...optically denser m spped less hoti h..

[@raman249]

Let's visualize this situation in denser medium particles are more massive ,they have more inertia thus they will move a relatively less (think of a particle on a longitudinal wave such as sound) compared to medium 1 , that means particles of medium 2 will get less compressed. Finally which explains that wavelength will be less in medium 2.

[@sonugupta147]

Sir at 3:06 how can the phase difference between incident wave and reflection wave will be pie. As it will be Delta phi = wt-k1x -( wt+k1x+pie)= -(pie+2k1x). Plz clear my doubt sir.

[@soumodeepchatterjee3248]

@Ankit Ghosh thx bro

[@sonamkaurkhurana290]

Sir reflected wave is always in dir opp to incident wave so how can it be in same phase with it even if ar is positive?

[@gigachad6844]

You are confusing direction of propagation with phase difference clear your basic concepts

[@sonugupta147]

@@gigachad6844 hello brother can you plz tell that how phase difference does not depend with direction of propegation of waves ? I also have same doubt. Plzz

[@nocontext3843]

1:45 you came to this conclusion by using the formula v=underoot T/u...Please tell if im wrong??

[@physicsgalaxyworld]

NO. At 1:45 Sir has written 'if' it is not a conclusion, its simply analysis for refraction of wave from a rarer to denser medium...

[@jasdeepsingh5876]

Sir, what do medium 1 and medium 2 represent... Like does it represent water and air, glass and water, etc.

[@physicsgalaxyworld]

These can be any physical medium...

[@rafiahmed3339]

sir,are'nt we talking abt the phase of boundary particles only as all different particles of med 1 and med 2 will have diff phase?

[@physicsgalaxyworld]

Yes... we talk about boundary particles only but thats the point from where reflected and transmitted wave starts...

[@rafiahmed3339]

sir at 3:00 why did'nt we take any other odd multiple of pi why only pi?

[@physicsgalaxyworld]

It does not affect anything... all odd multiple of pi are considered opposite phase only... And in this case there can be a max delay of half oscillations only thats why we used π

[@rajeevsingh1298]

Should make each video independent. Din't explain anything about the formule used.

[@physicsgalaxyworld]

+sachin sachin no possible... as this is physics so you need to study videos in sequence from start... I suggest you should follow videos in sequence on each topic on www.physicsgalaxy.com...

[@rajeevsingh1298]

Alright.

[@surajkumarbehera]

sir at 2:13 as V2

[@ishansoni5865]

Sound is a longitudinal wave while string wave is transverse... Hence we can't relate it like that