Question

Question 12 5 pts A son film bubble (n=133) with alrin - 1.00) on both sides has the smallest nonzero film thickness, such that it appears red by strongly reflecting light with a wavelength of 665 min Vacuum What would be the next smallest thickness for the soap film, such that it still appears red by strongly reflecting 665-nm light? O 125 mm 250 o o o o o 665m O 375 0775 Question 13 5 pts The Orion constellation, also known as the Hunter, is one of the brightest and best known constellations in the night sky. Two of the stars in Orion form a binary star system (two closely spaced stars orbiting each other). What is the smallest diameter (circular) telescope that you could use to optically resolve the two stars with 700mlight Assume the star system is 1150 ht years (109E19 m) from Carth and the average separation between the two stars is 1.1E14 m O. 4.m O 61 cm O 300m 092 cm

Answer 1

( n = 1.33 = 665 e nm For reflected light the the condition for Constructive interference (m-12) 2 m=1, 2, 3, n. 2 nt 1 minimum t, have m=1 we 2 nt min B) a tmin a ах an tmin کی Then the neah minimum thickness for, tha 2 2 a t'min 3 ax ㅗ 2. an 32 tmin 3x 665 un 4X1.33 tmin 375 nm 5 option (d)

(2 2. The power of a telescope i ginen R= 1.22 A d 1 D L given a = 700 nm R = 14 d = s. 1x10 m L 19 1.09810 a oth resolution D = diameter of the lens da distance between the two stars La distance of the stars >> D = 1.22 a L d 1.22x 700 x 1.0801019 1-1 X10 from earth 7 8.46 * 10 nm ༤ 7 8.46X10 -9 X 10 Or 0846 on - 8, 46cm D ~ 8.5 en option (as i the correct one