Answer:
1/4 λ film
Explanation:
Let L = total path length then L = 2 t where t is film thickness
There will be a 180 deg phase change at the air-film interface but no
phase change at the film-air interface
L = n * wavelength / 2 where n = 1, 3, 5, 7 etc
(the total path L must be an odd number of 1/2 wavelengths)
Or t = n * wavelength / 4 (the film must be an odd number
of 1/4 wavelengths thick)
1/4 λ film satisfies this condition
Note: Find the missing diagram in the attachment section.
Answer:
They wishin' on me, yuh
I been movin' calm, don't start no trouble with me
Tryna keep it peaceful is a struggle for me
Don't pull up at 6 AM to cuddle with me
You know how I like it when you lovin' on me
I don't wanna die for them to miss me
Yes, I see the things that they wishin' on me
Hope I got some brothers that outlive me
They gon' tell the story, shYit was different with me
Explanation:
85 + 45 = 130
130km in 1.5 hours
130 / 1.5 = 86.6666666666666
the average speed was:
86.6666666666666
a brainliest would be appreciated