Advertisements
Advertisements
Question
In a single slit diffraction experiment, when tiny circular obstacle is placed in path of light from a distance source, a bright spot is seen at the centre of the shadow of the obstacle. Explain why?
Advertisements
Solution
A bright spot is observed when a tiny circular object is placed in path of light from a distant source in a single slit diffraction experiment because light rays flare into the shadow region of the circular object as they pass the edge of the tiny circular object. The lights from all the edges of the tiny circular object are in phase with each other. Thus, they form a bright spot at the centre of the shadow of the the tiny circular object.
APPEARS IN
RELATED QUESTIONS
In what way is diffraction from each slit related to the interference pattern in a double-slit experiment?
State two points of difference between the interference patterns obtained in Young’s double slit experiment and the diffraction pattern due to a single slit.
The focal length of a this lens in vacuum is f. If the material of the lens has µ = 3/2, its focal length when immersed in water refractive index 4/3 will
Where is the screen placed in the single-slit experimental setup?
Which point on the screen lies along the normal to the slit?
How is point P located in the single-slit experimental setup?
What appears on either side of the central maximum?
How does the intensity of secondary maxima change as you move away from the centre?
Which equation equates the top-to-middle path difference to the value required for destructive interference?
Why are secondary maxima much weaker than the central maximum?
