Question

A Young’s double slit experiment uses a monochromatic source. The shape of the interference fringes formed on a screen is
A. Hyperbola
B. Circle
C. Straight line
D. Parabola

Answer 1

Remind the Young’s double slit experiment. Also remind the different shapes of the interference fringes formed for different sources of light and slits.

Complete step by step answer:
The light having a single wavelength is known as the monochromatic light.

When instead of the double slit experiment, a double hole experiment is carried, the interference fringe is hyperbolic.
In Young’s double slit experiment, a monochromatic source of light is used. Hence, the shape of the interference fringes formed on the screen is a straight line and not a hyperbola.
Hence, the option A is incorrect.

The light having a single wavelength is known as the monochromatic light.
In Young’s double slit experiment, a monochromatic source of light is used. Hence, the shape of the interference fringes formed on the screen is a straight line and not a circle.
Hence, option B is incorrect.

The light having a single wavelength is known as the monochromatic light.
In Young’s double slit experiment, a monochromatic source of light is used. Hence, the shape of the interference fringes formed on the screen is a straight line and not a parabola.
Hence, the option D is incorrect.

The light having a single wavelength is known as the monochromatic light.
In Young’s double slit experiment, a monochromatic source of light is used. Hence, the shape of the interference fringes formed on the screen is a straight line.

**Hence, the correct option is B.

Note: **
When a small interference pattern is considered, a hyperbolic shape also seems like a straight line.