Question

Which statement is not true regarding Newton's ring?
(a) they are fringes of equal inclination
(b) they are fringes of equal thickness
(c) they are localised fringes
(d) they are fringes with dark Central spot ​

Answer 1

Answer:

option C statement is not true regarding Newtons ring.

Explanation:

As per the data given in the question

We have to find the statement is not true regarding Newton's ring.

As per the questions

we have to find reason from four options

Due to the air film formed by a glass plate and a plano convex lens of large radius of curvature, interference fringes are formed which are observed directly through a travelling microscope. The rings are concentric circles and true for newtons ring.

Haidinger fringes are fringes localized at infinity. Also known as fringes of equal inclination.

so, statement C is not true regarding Newtons ring.

Hence, option C statement is not true regarding Newtons ring.

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Answer 2

Answer:

(c) they are localized fringes

Explanation:

The statement which is not true regarding Newton's ring is: they are localized fringes.

• Newton's ring is a phenomenon where we see the creation of an interference pattern by the reflection of light between two separate surfaces.
• Typically, in Newton's ring phenomena, a spherical surface and an adjacent touching flat surface are used as reflecting surfaces.
• This phenomenon is named after Isaac Newton and the effect was investigated by him in 1666.
• Newton's rings are fringes of equal inclination and have equal thickness. They have a dark central spot.
• There statement (a), statement (b), as well as, statement (d), correctly describe Newton's ring. But they are not localized fringes.
• Hence statement (c) is not true regarding Newton's ring.

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