Question

In the diffraction experiment, the angle of diffraction for the first order is \( \theta \). The corresponding wavelength of light is:

• A. \( \lambda \) and \( \phi \) are related
• B. \( \lambda \) and \( \phi \) are perpendicular
• C. The angle is between the two principal diffraction maxima
• D. The wavelength is not related to the diffraction angle

Hint:

In diffraction, the angle of diffraction depends on the wavelength of light. For higher-order maxima, the angle increases with increasing wavelength.

Answer 1

The Correct Option is A

Step 1: Understanding the diffraction equation.
The diffraction angle \( \theta \) and the wavelength \( \lambda \) are related through the diffraction equation, where \( d \) is the spacing between the slits, \( m \) is the order of diffraction, and \( \lambda \) is the wavelength. The angle \( \theta \) depends on the wavelength of the light and the distance between the slits.
Step 2: Conclusion.
The wavelength \( \lambda \) and the diffraction angle \( \theta \) are directly related as per the diffraction formula, making option (A) the correct answer.