JEE Main 202621 JanuaryEvening Shift
- Exam
- JEE Main
- Year
- 2026
- Date
- 21 January
- Shift
- Evening Shift
- Subject
- Physics
- Chapter
- Wave Optics
JEE Main 2026 · 21 January · Evening Shift · Physics · Wave Optics
Given below are two statements : Statement I : In a Young's double...
Given below are two statements :
Statement I : In a Young's double slit experiment, the angular separation of fringes will increase as the screen is moved away from the plane of the slits
Statement II: In a Young's double slit experiment, the angular separation of fringes will increase when monochromatic source is replaced by another monochromatic source of higher wavelength.
In the light of the above statements, choose the correct answer from the options given below :
Statement I : In a Young's double slit experiment, the angular separation of fringes will increase as the screen is moved away from the plane of the slits
Statement II: In a Young's double slit experiment, the angular separation of fringes will increase when monochromatic source is replaced by another monochromatic source of higher wavelength.
In the light of the above statements, choose the correct answer from the options given below :
Options
- ABoth Statement I and Statement II are false
- BStatement I is false but Statement II is true
- CBoth Statement I and Statement II are true
- DStatement I is true but Statement II is false
Correct answer
B. Statement I is false but Statement II is true
Step-by-step solution
In Young's double slit experiment, angular separation of fringes is where is wavelength and d is slit separation.
Statement I is false because angular separation is independent of screen distance; it depends only on the slit separation and wavelength.
Statement II is true because increasing the wavelength directly increases the angular separation .
Therefore, Statement I is false but Statement II is true.
Statement I is false because angular separation is independent of screen distance; it depends only on the slit separation and wavelength.
Statement II is true because increasing the wavelength directly increases the angular separation .
Therefore, Statement I is false but Statement II is true.