Question
What is diffraction? Which are the factors on which diffraction depends ? Give some examples of day to day life where the diffraction phenomenon is observed.
✓
Answer
• Diffraction :
→Is the effect produced due to the limited part of the wave front.
→It was first discovered by scientist Grimaldy
→Extent of diffraction depends on the ratio $\frac{\lambda}{d}$ (where, $\lambda$ - wave length and $d$ - width of the slit)
→As this ratio is larger diffraction is higher and as this ratio is smaller diffraction is lower.
→If we look clearly at the shadow cast by an opaque object, close to the region of geometrical shadow, there are alternate dark and bright regions just like in interference.
→This happens due to the phenomenon of diffraction.
→Diffraction is a general characteristic exhibited by all types of waves, be it sound waves, light waves, water waves or matter waves.
→Since the wave length of light is much smaller than the dimensions of most obstacles, we do not encounter diffraction effects of light in everyday observations.
→However, the finite resolution of our eye or microscopes is limited due to the phenomenon of diffraction.
→The colours that we see when a CD is viewed is due to diffraction effects.
→It is due to the phenomenon of diffraction that the person standing behind the open door inside the room can hear the voice of the person standing on the other side of the door but they can not see each other.
→Is the effect produced due to the limited part of the wave front.
→It was first discovered by scientist Grimaldy
→Extent of diffraction depends on the ratio $\frac{\lambda}{d}$ (where, $\lambda$ - wave length and $d$ - width of the slit)
→As this ratio is larger diffraction is higher and as this ratio is smaller diffraction is lower.
→If we look clearly at the shadow cast by an opaque object, close to the region of geometrical shadow, there are alternate dark and bright regions just like in interference.
→This happens due to the phenomenon of diffraction.
→Diffraction is a general characteristic exhibited by all types of waves, be it sound waves, light waves, water waves or matter waves.
→Since the wave length of light is much smaller than the dimensions of most obstacles, we do not encounter diffraction effects of light in everyday observations.
→However, the finite resolution of our eye or microscopes is limited due to the phenomenon of diffraction.
→The colours that we see when a CD is viewed is due to diffraction effects.
→It is due to the phenomenon of diffraction that the person standing behind the open door inside the room can hear the voice of the person standing on the other side of the door but they can not see each other.
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