Question

Please answer all Parts. Will rate up! Thanks!

Part A:

Two slits have a separation, 7.12×10⁻³ m. An interference pattern is created 5.46 m away from the slits, with a distance 0.832 m between the central bright fringe and the 9^th dark fringe below it. What is the wavelength of light used to create the pattern?

1.79×10⁻⁴ m

4.77×10⁻⁴ m

0.762 m

1.26×10⁻⁴ m

Part B:

Two two-slit experiments are conducted separately in two mediums to study the effect that medium has on interference. Each medium has a different indices of refraction, m and n, where m > n. In which medium are the interference fringes closer, if at all?

Fringes are the same distance in both mediums

m

n

Not enough information given to determine the answer

Part C:

What is the wavelength of light with constructive interference reflected from a thin film in a vacuum, with an index of refraction 1.42, a thickness of 5.50×10⁻⁹ m; which is the minimum thickness necessary?

7.75×10⁻⁹ m

3.12×10⁻⁸ m

3.91×10⁻⁹ m

1.56×10⁻⁸ m

Part D:

You hold a lens horizontally to form an image of an object on the ground. You observe that the image is formed above the lens. Which of the statements below are correct?

The image is virtual

None are correct

The image is inverted

It is a concave lens

Answer 1