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The tip of a needle does not give a sharp image on a screen. This is due to
- a)polarisation
- b)interference
- c)diffraction
- d)None of these
Correct answer is option 'C'. Can you explain this answer?
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The tip of a needle does not give a sharp image on a screen. This is d...
Image is not sharp because of deviation of light from straight line path account of diffraction of light.
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The tip of a needle does not give a sharp image on a screen. This is d...
Diffraction
Diffraction is the bending of waves around obstacles and the spreading of waves as they pass through small openings. When light waves pass through a small opening such as the tip of a needle, diffraction occurs. This causes the light waves to spread out and interfere with each other, creating a blurry image on the screen.
Explanation
When light waves pass through the tip of a needle, they diffract and create a pattern of interference on the screen. This interference pattern results in a lack of a sharp image, as the diffracted waves do not converge to a single point on the screen. Instead, they interfere with each other, creating a blurred image.
Comparison to Polarisation and Interference
Polarisation and interference are not the reasons for the lack of a sharp image on the screen when light passes through the tip of a needle. Polarisation refers to the orientation of light waves, which does not affect the sharpness of the image. Interference occurs when two or more waves overlap, leading to constructive or destructive interference patterns, but this does not cause the blurriness seen in the image formed by the needle's tip.
In conclusion, the blurriness of the image formed by the tip of a needle on a screen is due to diffraction, which causes the light waves to spread out and interfere with each other, resulting in a lack of sharpness.
Diffraction is the bending of waves around obstacles and the spreading of waves as they pass through small openings. When light waves pass through a small opening such as the tip of a needle, diffraction occurs. This causes the light waves to spread out and interfere with each other, creating a blurry image on the screen.
Explanation
When light waves pass through the tip of a needle, they diffract and create a pattern of interference on the screen. This interference pattern results in a lack of a sharp image, as the diffracted waves do not converge to a single point on the screen. Instead, they interfere with each other, creating a blurred image.
Comparison to Polarisation and Interference
Polarisation and interference are not the reasons for the lack of a sharp image on the screen when light passes through the tip of a needle. Polarisation refers to the orientation of light waves, which does not affect the sharpness of the image. Interference occurs when two or more waves overlap, leading to constructive or destructive interference patterns, but this does not cause the blurriness seen in the image formed by the needle's tip.
In conclusion, the blurriness of the image formed by the tip of a needle on a screen is due to diffraction, which causes the light waves to spread out and interfere with each other, resulting in a lack of sharpness.
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The tip of a needle does not give a sharp image on a screen. This is due toa)polarisationb)interferencec)diffractiond)None of theseCorrect answer is option 'C'. Can you explain this answer?
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