- Exam
- NEET
- Year
- 2023
- Subject
- Physics
- Chapter
- Wave Optics
NEET 2023 · Physics · Wave Optics
For Young's double slit experiment, two statements are given below:...
For Young's double slit experiment, two statements are given below:
Statement : If screen is moved away from the plane of slits, angular separation of the fringes remains constant.
Statement : If the monochromatic source is replaced by another monochromatic source of larger wavelength, the angular separation of fringes decreases.
In the light of the above statements, choose the correct answer from the options given below:
Options
- AStatement is false but Statement is true.
- BBoth Statement and Statement are true.
- CBoth Statement and Statement are false.
- DStatementis true but Statement false.
Correct answer
D. Statementis true but Statement false.
Step-by-step solution
For YDSE, angular fringe width is given by, . Clearly, angular width doesn't depend on the distance of the screen from the slit.
Also, . So as wavelength increases, angular separation of fringes increases. So, statement I is true and statement II is false.