Physics · Wave Optics
JEE Main 2024 — 1 February, Shift 1 — Question 46
A monochromatic light of wavelength is incident on the single slit of width 0.01 mm . If the diffraction pattern is formed at the focus of the convex lens of focal length 20 cm , the linear width of the central maximum is :
- Option A:
60 mm
- Option B:Correct
24 mm
- Option C:
120 mm
- Option D:
12 mm
Answer: B
Step-by-step solution
Linear width
\begin{array}{*{35}{r}}\text{W} & ~=\frac{2\lambda \text{ }\!\!~\!\!\text{ d}}{\text{a}}=\frac{2\times 6\times {{10}^{-7}}\times 0.2}{1\times {{10}^{-5}}} \\{} & ~=2.4\times {{10}^{-2}}=24\text{ }\!\!~\!\!\text{ mm} \\\end{array}
Answer key and solution verified before publishing.
Practise Wave Optics
Start with this question, then two more from the same chapter — with a tutor that explains every step. Free.
- Exam
- JEE Main 2024
- Paper
- 1 February, Shift 1
- Subject
- Physics
- Chapter
- Wave Optics
- Topic
- Diffraction of Light Waves