Question:
For a diffraction from a single slit, the intensity of the central point is
For a diffraction from a single slit, the intensity of the central point is
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Central maximum = brightest and widest in single slit diffraction.
Updated On: May 2, 2026
- infinite
- finite and same magnitude as surrounding maxima
- finite but much larger than the surrounding maxima
- finite and substantially smaller than surrounding maxima
- zero
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The Correct Option is C
Solution and Explanation
Concept: Single slit diffraction pattern
Intensity distribution: \[ I = I_0 \left(\frac{\sin \beta}{\beta}\right)^2 \] ---
Step 1: Central maximum At $\beta = 0$: \[ I = I_0 \] This is maximum possible intensity. ---
Step 2: Comparison
• Central maximum is widest
• Central intensity is highest
• Side maxima are much weaker ---
Step 3: Physical explanation
• At center → all waves interfere constructively
• Away from center → partial cancellation --- Final Answer: \[ \boxed{\text{finite but much larger than surrounding maxima}} \]
Intensity distribution: \[ I = I_0 \left(\frac{\sin \beta}{\beta}\right)^2 \] ---
Step 1: Central maximum At $\beta = 0$: \[ I = I_0 \] This is maximum possible intensity. ---
Step 2: Comparison
• Central maximum is widest
• Central intensity is highest
• Side maxima are much weaker ---
Step 3: Physical explanation
• At center → all waves interfere constructively
• Away from center → partial cancellation --- Final Answer: \[ \boxed{\text{finite but much larger than surrounding maxima}} \]
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