A plane wave with a wavelength of 500 nm is incident normally ona single slit with a width of 5.0 x 10^-6 m. Consider waves that reach a point on a far-away screen such thatrays from the slit make an angle of 1.0° with the normal. The difference in phase for waves from the top and bottom of the slit is .
A) 0
B) 0.55 rad
C) 1.1 rad
D) 1.6 rad
E) 2.2 rad

the best answer for these questions would be:

1.            c. is smaller

2.            d) concrete operational

3.            b) interaction with the environment – the children interact with their environment can them learn more.

4.            a) parents who reason openly with children can limit a child’s cognitive ability.

ingenuity says that the answer is 2.7 m.