Fill in blank without a word bank (unit is wave nature of light)

1. As water waves travels through a slit barrier, they bend and spread out. This is known as ______
2. Two identical waves will interfere destructively, cancelling one another out, when one lags behind the other by a minimum of ___ wavelength
3. a line along which crests consistently meet crests and troughs constantly meet troughs is called a(n) ____ line
4. For two points sources vibrating in phase producing an interference pattern, the line along the central bisector is a(n) ____ line

1. diffraction

2. 1/2
3. antinodal?
4. ?

1. As water waves travels through a slit barrier, they bend and spread out. This is known as diffraction.

2. Two identical waves will interfere destructively, cancelling one another out, when one lags behind the other by a minimum of half a wavelength.
3. A line along which crests consistently meet crests and troughs constantly meet troughs is called a nodal line.
4. For two point sources vibrating in phase producing an interference pattern, the line along the central bisector is a interference line.

1. As water waves travel through a slit barrier, they bend and spread out. This is known as diffraction.

To understand this phenomenon, you can visualize it by picturing water waves passing through a narrow gap or slit. As the waves encounter the opening, they undergo diffraction, which refers to the bending and spreading out of the waves around obstacles or through gaps. This behavior arises due to the wave nature of water waves.

2. Two identical waves will interfere destructively, canceling one another out, when one lags behind the other by a minimum of half a wavelength.

To determine this minimum value, you need to understand the concept of destructive interference. When two waves of the same frequency and amplitude interfere, they can either reinforce each other (constructive interference) or cancel each other out (destructive interference). In the case of destructive interference, there will be points where the wave amplitudes exactly cancel each other, resulting in a net amplitude of zero.

For identical waves to interfere destructively, one wave needs to lag behind the other by at least half of a wavelength. This means that the peak of one wave aligns with the trough of the other wave, resulting in their amplitudes canceling each other.

3. A line along which crests consistently meet crests and troughs constantly meet troughs is called a nodal line.

To understand this concept, you need to visualize an interference pattern resulting from the superposition of two waves. When two waves of the same frequency and amplitude interfere, they form regions where the peaks (crests) of one wave align with the peaks (crests) of the other wave, resulting in constructive interference and regions where the peaks align with the troughs, resulting in destructive interference.

Along the line where the crests consistently meet crests and troughs constantly meet troughs, the resulting amplitude is always at a minimum (zero). This line is referred to as a nodal line.

4. For two point sources vibrating in phase, producing an interference pattern, the line along the central bisector is a constructive interference line.

To understand this, imagine two point sources vibrating in phase, emitting waves that overlap and interfere with each other. When the waves from these sources meet at a particular point, they can either reinforce each other (constructive interference) or cancel each other out (destructive interference).

Along the central bisector, the waves from these two sources meet and constructively interfere, resulting in a maximum amplitude. This line is therefore referred to as the constructive interference line.

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