Problem 22.05 part a in a double slit experiment, if the separation between the two slits is 0.050 mm and the distance from the slits to a screen is 2.5 m, find the spacing between the first-order and second-order bright fringes when coherent light of wavelength 600 nm illuminates the slits.

a. 9.0 cm
b. 6.0 cm
c. 1.5 cm
d. 4.5 cm
e. 3.0 cm

Explanation:

Two slits with separation, d, and distance from the slits to a screen, L, produce bright fringes. The spacing, x, between the central fringe and the n-order bright fringe.

The spacing between the first and second bright is:

v 154.9= 0.9 length length s little over 154.9cm

answer: at 24 february, 2014 the population gets twice of its initial population.

explanation:

since we have given that

the population for alpha city, t years after january 1, 2004 is given as

first we find out the initial population, i.e. t=0,

so, our quadratic equation becomes,

according to question, we have said that if the population has twice its initial population, then it becomes

so, time taken to reach this above mentioned population is given by

now, we know that time can't be negative so, we take t=9.149 years.

hence, at 24 february, 2014 the population gets twice of its initial population.