WBJEE · Physics · Wave Optics
For Fraunhoffer diffraction to occur
- A Light source should be at infinity
- B Both source and screen should be at infinity
- C Only the source should be at finite distance
- D Both source and screen should be at finite distance
Answer & Solution
Correct Answer
(B) Both source and screen should be at infinity
Step-by-step Solution
Detailed explanation
For Fraunhotfer diftraction to occur, both source and screen should be at infinity. it is essential condition for diffraction pattern.
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 mass of \(1 \mathrm{kg}\) is suspended by means of a thread. The system is
(i) lifted up with an acceleration of \(4.9 \mathrm{ms}^{-2}\)
(ii) lowered with an acceleration of \(4.9 \mathrm{ms}^{-2}\). The ratio of tension in the first and second case isWBJEE 2016 Medium - A 2 V cell is connected across to points A and B as shown in the figure. Assume that the resistance of each diode is zero in forward bias and infinity in reverse bias. The current supplied by the cell is
WBJEE 2024 Easy - A non-zero current passes through the galvanometer \(G\) shown in the circuit when the key \(K\) is closed and its value does not change when the key is opened. Then, which of the following statement(s) is/are true?
WBJEE 2018 Hard - Two monochromatic coherent light beams \(A\) and \(B\) have intensities \(L\) and \(\frac{L}{4},\) respectively. If these beams are superposed, the maximum and minimum intensities will beWBJEE 2017 Easy
- A point source of light is used in an experiment of photo-electric effects. If the distance between the source and the photo-electric surface is doubled, which of the following may result?WBJEE 2020 Medium
- If \(x_1\) be the size of the magnified image and \(x_2\) the size of the diminished image in Lens Displacement Method, then the size of the object is :WBJEE 2010 Easy
More PYQs from WBJEE
- The angle between the lines joining the foci of an ellipse to one particular extremity of the minor axis is \(90^{\circ}\). The eccentricity of the ellipse isWBJEE 2009 Medium
- If \(a, b, c\) are real, then both the roots of the equation \((x-b)(x-c)+(x-c)(x-a)+(x-a)(x-b)=0\) are alwaysWBJEE 2009 Hard
- One mole of an ideal monoatomic gas is heated at a constant pressure from \(0^{\circ} \mathrm{C}\) to \(100^\circ C\). Then the change in the internal enery of the gas is (Given, \(R=8.32 \mathrm{J} \mathrm{mol}^{-1} \mathrm{K}^{-1}\) )WBJEE 2014 Easy
- The temperature of anideal gas is increased from \(120 \mathrm{~K}\) to \(480 \mathrm{~K}\). If at \(120 \mathrm{~K}\), the root mean square speed of gas molecules is \(v\), then at \(480 \mathrm{~K}\) it will beWBJEE 2010 Easy
- Dissolving NaCN in de-ionised water will result in a solution havingWBJEE 2017 Easy
- Commercial sample of \(\mathrm{H}_{2} \mathrm{O}_{2}\) is labeled as \(10 \mathrm{V}\). Its % strength is nearlyWBJEE 2014 Medium