you perform a double-slit experiment using green light, and the bright fringes a

Question

you perform a double-slit experiment using green light, and the bright fringes are found to be separated by 1.5 mm. Afterward, you immerse the entire apparatus in water, which has n = 1.33. Choose the most correct answer about what you expect to occur.

A) The fringe spacing decreases.

B) The fringe spacing increases.

C) The pattern and its intensity are unchanged.

D) The fringe spacing increases and the intensity of each fringe decreases a little.

E) The intensity of the fringes decreases a little, but the spacing is the same.

PLEASE EXPLAIN

Unpolarized light is incident on four polarizing sheets. The first one has it

Explanation / Answer

1. spacing = lambda L/d

with the bigger n, lambda decreases so fringe spacing decreases

a)

2)
a) it wil be polarizedalong the last polarizer so 90 degrees

b) lost1/2 on first and cos(dtheta)^2 on others so

0.5*cos(30)^2*cos(30)^2*cos(30)^2=0.211

c) 0.211*100 = 21.1 W/m^2

Related Questions

Navigate

• Browse (All)
• Browse Y
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.