580 nm light shines on a double slit with d=0.000125 m. What is the angle of the third dark interference minimum (m=3)? (Remember, nano means 10^-9.)
(Unit=deg)

0.66 degrees

Explanation:

The computation of the angle of the third dark interference is shown below:

The condition of the minima is

Path difference = (2n +1) × ÷ 2

For third minima, n = 2

Now

xd ÷ D = (2 × 2 + 1) × ÷ 2

d tan Q_3 = 5 ÷ 2

tan Q_3 = 5 ÷ 2d

Q_3 = tan^-1 × (5 ÷2d)

= tan^-1 × (5 × 580 × 10^-9) ÷ (2 × 0.000125)

= 0.66 degrees

i had this question and the answer was 3.15 miles.

martina travels from school to her mom's office. from there, she walks to school. after school, she walks to the library and then to a friends house before finally ending back at home. find martina's total distance traveled.

a) 0 miles  

b) 0.4 miles  

c) 1 mile  

d) 3.15 miles