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PHONE NUMBERS OF SOMETHING :)TRANSCRIPT
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Call 1600-111-533 (toll-free) for info. Formula Booklet – Physics XI
QUEST - Power Coaching for IITJEE
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1, Vigyan Vihar, Near Anand Vihar, Delhi – 92. Ph: 55270275, 55278916E-16/289, Sector 8, Rohini, Delhi – 85, Ph: 55395439, 30911585
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33(b) Source between observer and walln’ =nxvvvs
+(for direct waves)n’ =s
vvv−
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x n (for reflected waves)(ii) Source moving away from wall(a) Observer between source and walln’ =nxvvvs
+(for direct waves)n’ =s
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vvv+x n (for reflected waves)(b) Source between observer and walln’ =nxvvvs
−(for direct waves)n’ =s
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vvv+x n (for reflected waves)(g) Moving Target:(i) S and O stationary at the same place and target approaching with speed un’ =nxuvuv
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−+or n’ =nxvu21 +
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(for u <<v)(ii) S and O stationary at the same place and target receding with speed un’ =nxuvuv +−
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or n’ =nxvu21 −(for u <<v)(h) SONAR: n’ =nxvv2 1nxvvvvsubsubsub
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±≅±± (upper sign for approaching submarine while lower sign for receding submarine)(i) Transverse Doppler effect: Ther
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e is no transverse Doppler effect in sound. For velocitycomponent vs
cosθ n’=nxcosvvvs
θ±
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(– sign for approaching and + sign for receding)24. Doppler Effect for light(a) Red shift (when light source is moving away):n’ =nxc/v1c/v1+−or
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λ’ =λ−+xc/v1c/v1 For v << c,∆n = –nxcv
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or ∆λ’ = cvxλ
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(b) Blue shift (when light source is approaching)n’ =nxc/v1c/v1−+or λ’ =λ+−xc/v1c/v1 For v << c,
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∆n =n cv or ∆λ’ =–
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cv
λ
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Call 1600-111-533 (toll-free) for
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info. Formula Booklet – Physics XI
QUEST - Power Coaching for IITJEE
1, Vigyan Vihar, Near Anand Vihar, Delhi – 92.
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Ph: 55270275, 55278916E-16/289, Sector 8, Rohini, Delhi – 85, Ph: 55395439, 30911585 34(c) Doppler Broadening = 2
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∆λ= 2 cv
λ (d) Transverse Doppler effect:For light, n’ =nxcv 211nxcv1
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2222
−=−(for v << c)(e) RADAR:∆n
=
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cv2n
Call 1600-111-533 (toll-free) for
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info. Formula Booklet – Physics XI
QUEST - Power Coaching for IITJEE
1, Vigyan Vihar, Near Anand Vihar, Delhi – 92.
![Page 25: Call](https://reader036.vdocuments.mx/reader036/viewer/2022062515/563db77d550346aa9a8b7fcb/html5/thumbnails/25.jpg)
Ph: 55270275, 55278916E-16/289, Sector 8, Rohini, Delhi – 85, Ph: 55395439, 30911585 35
STUDY TIPS•
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Combination of SubjectsStudy a combination of subjects during a day i. e. after studying 2–3 hrs of mathematicsshift to any theoretical
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subject for 2 horrs. When we study a subject like math, aparticular part of the brain is working more than rest of the brain. When we shift to
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atheoretical subject, practically the other part of the brain would become active and thepart studying maths will go for rest.•
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RevisionAlways refresh your memory by revising the matter learned. At the end of the day youmust revise whatever you’ve learnt during that day
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(or revise the previous days workbefore starting studies the next day). On an average brain is able to retain the newlylearned information 80% only for 12 hours,
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after that the forgetting cycle begins. After this revision, now the brain is able to hold the matter for 7 days. So next revision shouldbe after 7 days (sundays
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could be kept for just revision). This ways you will get rid of theproblem of forgetting what you study and save a lot of time in restudying that topic.
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•Use All Your SensesWhatever you read, try to convert that into picture and visualize it.Our eye memory
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ismany times stronger than our ear memory since the nerves connecting brain to eye aremany times stronger than nerves connecting brain
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to ear. So instead of trying to mug upby repeating it loudly try to see it while reapeating (loudly or in your mind). This isapplicable in theoritical subjects. Try to
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use all your senses while learning a subjectmatter. On an average we remember 25% of what we read, 35% of what we hear, 50%of what we
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say, 75% of what we see, 95% of what we read, hear, say and see.•Breathing and RelaxationTake special care of your
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breathing. Deep breaths are very important for relaxing your mind and hence in your concentration. Pranayam can do wonders to your concentration,rela
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xation and sharpening your mined (by supplying oxygen to it). Aerobic exercises likeskipping, jogging, swimming and
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cycling are also very helpful.Activity (249)
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