Wedge Shaped Films-Determination - Interference of Light - Engineering Physics 2

TL;DR

This video explains how to measure the diameter of a wire using the interference pattern produced by a wedge-shaped film.

Transcript

click the bell icon to get latest videos from ekeeda hello friends in this particular video we are going to study an application of the interference pattern that we are obtaining in a wet shape film and we are going to use this pattern in order to measure the thickness of either a wire that is the diameter of a wire or the thickness of a very thin ... Read More

Key Insights

• 🤔 A wedge-shaped film can be used to measure the diameter of a wire or the thickness of a very thin paper foil.
• 🎥 The interference pattern produced by the film helps in determining the wire diameter.
• 🙂 The formula involves the wavelength of light, refractive index, fringe width, and the distance between the plates.
• 🛜 The fringe width is directly proportional to the wire diameter.
• 🧀 The application of measuring wire diameter using a wedge-shaped film is based on the theory of interference patterns.
• 🛜 The parameters required to calculate the wire diameter can be accurately measured.
• 🏮 This method can also be applied to measure the thickness of other materials such as paper foil.

Questions & Answers

Q: What is the purpose of using a wedge-shaped film in this application?

The wedge-shaped film is used to create an interference pattern that can be utilized to measure the diameter of a wire.

Q: How is the fringe width related to the wire diameter?

The fringe width is directly proportional to the wire diameter. By measuring the fringe width, the diameter of the wire can be determined using a specific formula.

Q: Can this method be used to measure the thickness of paper foil?

Yes, the same principle can be applied to measure the thickness of a very thin paper foil by using an interference pattern produced by a wedge-shaped film.

Q: What are the parameters required to calculate the wire diameter?

The parameters required are the wavelength of light, refractive index, fringe width, and the distance between the plates.

Summary & Key Takeaways

• The video discusses the formation of a wedge-shaped film using two glass plates and a wire placed between them.

• By measuring the fringe width of the interference pattern, the diameter of the wire can be determined.

• The formula for calculating the wire diameter involves the wavelength of light, refractive index, fringe width, and distance between the plates.