4.9 Interference of Waves in 2 Dimensions

True or false? A super crest is an example of constructive interference.

• True

• False

True or False? A super trough is an example of constructive interference.

• True

• False

True or false? A node is an ample of constructive interference.

• True

• False

In 2 point interference, nodal lines

• only occur at super crests

• only occur at super troughs

• only occur at nodes

• can occur at super crests, super troughs, or nodes

When the frequency of the 2 point sources is increased, the wavelength of the interference pattern

• increases, making nodal lines further apart and increasing their number

• increases, making nodal lines closer together and increasing their number

• decreases, making nodal lines further apart and decreasing their number

• decreases, making nodal lines closer together and increasing their number