From young's experiment, how does the frequency of light affect the number of lines observed?

a. higher frequencies equal more lines

b. lower frequencies equal more lines

c. higher frequencies have larger spaces between lines

d. lower frequencies have smaller spaces between lines

Answer : (C) "Higher frequencies have larger spaces between lines".

Explanation:

In Young's experiment, the condition for constructive interference is given by :

.........(1)

n is order or number of lines observed

d is distance between slits

is the angle between the path and the line from screen to the slits.

We also know that,

or

where,

c is the speed of light

is frequency

is wavelength

So, equation (1) turns into

So,

or

Higher frequencies have larger spaces between line.

So, correct option is (C).

A: Higher frequencies equal more lines

Explanation:

I took the test and that's the answer. (See screen shot below)

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