AP EAMCET · PHYSICS · Wave Optics
In Fraunhofer diffraction experiment, \(L\) is the distance between screen and the obstacle, \(b\) is the size of obstacle and \(\lambda\) is wavelength of incident light. The general condition for the applicability of Fraunhofer diffraction is
- A \(\frac{b^2}{L \lambda} \gg 1\)
- B \(\frac{b^2}{L \lambda}=1\)
- C \(\frac{b^2}{L \lambda} \ll 1\)
- D \(\frac{b^2}{L \lambda} \neq 1\)
Answer & Solution
Correct Answer
(C) \(\frac{b^2}{L \lambda} \ll 1\)
Step-by-step Solution
Detailed explanation
The general condition for Froun hofer diffraction is \(\frac{b^2}{L \lambda} \ll 1\).
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from PHYSICS
- A coil of 45 turns and radius 4 cm is placed in a uniform magnetic field such that its plane is perpendicular to the direction of the field. If the magnetic field increases from 0 to 0.70 T at a constant rate in a time interval of 220 s, then the induced emf in the coil isAP EAMCET 2025 Medium
- A motor vehicle of mass \(1000 \mathrm{~kg}\) is moving on a circular road having banking angle \(30^{\circ}\) and coefficient of friction 0.2 . Then the normal reaction force on the motor vehicle is about
(Acceleration due to gravity \(=10 \mathrm{~ms}^{-2}\) )AP EAMCET 2023 Easy - In Huygen's eyepieceAP EAMCET 2007 Easy
- If \(\lambda_0\) is the de-Broglie wavelength for a proton accelerated through a potential difference of \(100 \mathrm{~V}\), the de-Broglie wavelength for \(\alpha\)-particle accelerated through the same potential difference isAP EAMCET 2002 Hard
- The average depth of Indian ocean is about \(3000 \mathrm{~m}\). The value of fractional compression \(\left(\frac{\Delta V}{V}\right)\) of water at the bottom of the ocean is (given that the bulk modulus of water is \(2.2 \times 10^9 \mathrm{Nm}^{-2}, g=9.8, \rho_{\mathrm{H}_2 \mathrm{O}}=1000 \mathrm{~kg} . \mathrm{m}^{-3}\) )AP EAMCET 2015 Medium
- The ratio of kinetic energy of a diatomic gas molecule at a high temperature to that of NTP isAP EAMCET 2024 Easy
More PYQs from AP EAMCET
- Two identical thin bar magnets each of length \(l\) and pole strength \(m\) are placed at right angles to each other with north-pole of one touching south-pole of the other, then the magnetic moment of the system isAP EAMCET 2022 Medium
- The sum of the lengths of the subtangent and the subnormal drawn at \(\theta=\frac{\pi}{3}\) on the cycloid \(x=a(\theta-\sin \theta)\) : \(y=a(1-\cos \theta)\) isAP EAMCET 2021 Medium
- If the roots of the equation \(x^3+a x^2+b x+c=0\) are in arithmetic progression, thenAP EAMCET 2024 Easy
- If the petrol burnt in driving a motor boat varies as the cube of the velocity, then the speed (in \(\mathrm{km} /\) hour) of the boat going against a water flow of \(C \mathrm{kms} /\) hour so that the quantity of petrol burnt is minimum isAP EAMCET 2018 Medium
- The mean marks of 25 boys in a class is 61 and the mean marks of 35 girls in the same class is 58 . Then, the mean of all 60 students isAP EAMCET 2021 Medium
- The ratio of the de-Broglie wavelengths for the electron and proton moving with the same velocity is \(\left(m_p\right.\)-mass of proton, \(m_e\)-mass of electron)AP EAMCET 2015 Easy