Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
JEE Advanced2024PhysicsWave OpticsActual

A point source S emits unpolarized light uniformly in all directions. At two points A and B , the ratio r=I_A / I_B of the intensities of light is 2. If a set of two polaroids having 45^ angle between their pass-axes is placed just before point B , then the new value of r will be ______

Correct answer

0

Step-by-step solution

(I 1 l^2 ) Where I: distance from point source. ( aligned & I_A I_B = I_B^2 I_A^2 =2 & I_B= 2 I_A . aligned ) Also, due to polaroids: ( aligned & I_B^ = I_B 2 ^2 45^ = I_B 4 & I_B^ = I_B 4 (2) & Ratio becomes 4 times. & r_ new =8 aligned )

Practice Wave Optics on Quantrex Academy →

More from Wave Optics

In the List-I, four optical effects are mentioned. The physical phenomena of light which are essential to describe these optical effects are given in List-II. Choose the option whi 2026In a single slit diffraction experiment, a slit of width (0.016 0.002) mm is used to measure the wavelength of a monochromatic light source. In the diffraction pattern, the angular 2026As shown in the figure, a ray AB of unpolarized light enters from water of refractive index n_w = 4/3 into a medium of refractive index n_p = 4/ 3 after passing through a glass pla 2026Some distant star is to be observed by some telescope of diameter of objective lens a , at an angular resolution of 3.0 10⁻⁷ radian. If the wavelength of light from the star reachi 2026In a Young double slit experiment, the wavelength of incident light is 6000 Å, the separation between slits S₁ and S₂ is 5 cm and the distance between slits plane and screen is 50 2026In interference experiment the path difference between two interfering waves at a point A on the screen is /3 , where is the wavelength of these waves, and at another point B the p 2026An unpolarized light of intensity I_o passes through polarizer and then through a certain optically active solution and finally it goes to analyser. If the angle between analyser a 2026The maximum intensity in a Young's double slit experiment is I₀ . Distance between the slits ( d ) is 5 , where is the wavelength of light used. The intensity of the fringe, exactl 2026 Full Wave Optics list All JEE Advanced PYQs