For the double-slit interference, describe what happens to the observed pattern when:
a. The slit width is held constant, but the spacing between them increases.
b. The spacing between the slits is held constant, but the width of each increases.

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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.