Why are fringes straight?
In a wedge-shaped film, each fringe is the locus of points of equal thickness of the film. For wedge shape air film, the locus of points of equal thickness is straight lines parallel to the edge of the wedge. So, fringes appear straight and parallel.
How circular fringes are formed?
The fringes formed in Michelson interferometer may be circular, curved or straight depending upon the nature of the air film. Concentric circular fringes (fringes of equal inclination): Concentric circular fringes are obtained when the air film is parallel as shown in Fig. 2.
What are the shape of interference fringes?
interference fringes of different shapes (a) generates circular fringes when the observation point lies on a line perpendicular to the line joining the two sources of light, i.e., when two mirrors are parallel to each other and (b) generates straight or conic fringes when the mirrors are inclined at an angle.
What is the shape of interference pattern?
Thus the fringes will of Circular shape centered at O.
What is the condition for seeing nearly straight fringes?
What is the condition for seeing nearly straight fringes? Answer: Explaination: If distance between the plane of the two coherent sources and screen is very large compared to the fringe width; the fringes will be nearly straight lines.
What is the nature of interference pattern for thin film of wedge shaped?
The interference pattern in wedge shaped film consists of alternate dark and bright bands which are parallel to each other and they are equally spaced. The shape of the fringe depends on how the thickness of the air film enclosed varies.
What band bright or dark is obtained at t 0 at the vertex of the wedge shaped film Why?
The zero order fringe will occur at the positions where thickness of the film is zero. This position is the edge of the wedge. Due to the phase change of π due to reflection the zero order will be a dark fringe. So the zero order dark fringe will be formed at the edge of the wedge as shown in Fig.
What is the definition of wedge shaped?
Adj. 1. wedge-shaped – (of a leaf shape) narrowly triangular, wider at the apex and tapering toward the base. cuneate. unsubdivided, simple – (botany) of leaf shapes; of leaves having no divisions or subdivisions.
What is the name for a wedge shape?
wedge-shaped; cuneate; cuneiform; cuneal.
What is the meaning of wedge?
wedge noun (SHAPE) with a pointed edge at one end and a wide edge at the other, either pushed between two objects to keep them still or forced into something to break pieces off it: a piece of something, especially food, in the shape of a triangle: Auntie Ann put a huge wedge of cake on my plate.
What is saucer shaped?
Definitions of saucer-shaped. adjective. having a concave shape like a saucer. Synonyms: concave. curving inward.
Are saucer shaped holes?
Answer. Answer: These holes are called craters. Many of them are impact carters which are formed between 3000 and 4000 million years ago when meteorites and asteroids hit the surface of the moon.
What is saucer shaped depression?
The midwife may also notice a saucer shape depression in the abdomen around the area of the umbilicus indicating the fetus is in an occipito-posterior (OP) position. The umbilicus may protrude as pregnancy advances.
What does saucer eyed mean?
Definitions of saucer-eyed. adjective. having large round wide-open eyes. synonyms: round-eyed eyed. having an eye or eyes or eyelike feature especially as specified; often used in combination.
What does Zee mean?
zē Filters. Something Z-shaped.