Answer:
The tangent of θ is 0.5.
Step-by-step explanation:
Given that,
Distance on the screen = 6.0 cm
Distance from the gap to the screen = 12 cm
We need to calculate the angle
The relation between the distance between the fringes and the distance from the gap to the screen.

Where, y = distance between the fringes
D = distance from the gap to the screen
Put the value into the formula


Hence, The tangent of θ is 0.5.