A light rope (small m/L) is fused to a heavy rope (large m/L). If I wiggle the light rope,
most of the wiggles are reflected back; very few wiggles transmit through the heavy rope
some of the wiggles are reflected back; some of the wiggles transmit through the heavy rope
very few of the wiggles are reflected back; most of the wiggles transmit through the heavy rope
???
A light rope (small m/L) is fused to a heavy rope (large m/L). If I wiggle the heavy rope,
most of the wiggles are reflected back; very few wiggles transmit through the light rope
some of the wiggles are reflected back; some of the wiggles transmit through the light rope
very few of the wiggles are reflected back; most of the wiggles transmit through the light rope
???
How do the speed of the waves compare in the light rope (vl) and heavy rope (vH)?
vl<vH
vl=vH
vl>vH
Announcements
Homework 9 posted (teams submit one project problem; same repository for all project problems)
Quiz 5 on Friday March 24th (DC out of town; quiz for first 20-25 minutes of class)
Topic of quiz given this Friday (likely, introduction to waves and some sketching)
For our reflected and transmitted waves, how many unknowns have we introduced?
ER=~ERei(kRz−ωRt)ˆnRET=~ETei(kTz−ωTt)ˆnT
2
4
8
12
None of the above
For our reflected and transmitted waves, how many unknowns have we introduced?
ER=~ERei(kIz−ωIt)ˆnIET=~ETei(kTz−ωIt)ˆnI
2
4
8
12
None of the above
An EM wave is normally incident on a boundary between two materials (n1≪n2). If the incident wave starts in material 1,
most of the wave is reflected back; very little of the wave transmits through material 2
some of the wave is reflected back; some of the wave transmits through material 2
very little of the wave is reflected back; most of the wave transmits through material 2
???
An EM wave is normally incident on a boundary between two materials (n1≪n2). If the incident wave starts in material 2,
most of the wave is reflected back; very little of the wave transmits through material 1
some of the wave is reflected back; some of the wave transmits through material 1
very little of the wave is reflected back; most of the wave transmits through material 1
???
An EM wave is normally incident on a boundary between two materials (n1 is close to n2). If the incident wave starts in material 1,
most of the wave is reflected back; very little of the wave transmits through material 1
some of the wave is reflected back; some of the wave transmits through material 1
very little of the wave is reflected back; most of the wave transmits through material 1
???
A light rope (small m/L) is fused to a heavy rope (large m/L). If I wiggle the light rope,
most of the wiggles are reflected back; very few wiggles transmit through the heavy rope
some of the wiggles are reflected back; some of the wiggles transmit through the heavy rope
very few of the wiggles are reflected back; most of the wiggles transmit through the heavy rope
???
Correct answer: A