Wave Optics · Question 6

JEE Advanced 2024 Paper 1NumericalEasy📈 Topic in 33% papers+4

A point source S emits unpolarized light uniformly in all directions. At two points A and B, the ratio r=IA/IB 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 .

Answer

Solution

First polaroid passes half of unpolarized light: IB2.

Second polaroid (Malus' law): IB2 245 = IB4.

New ratio r= IAIB/4=4 2=8.

Answer: 8

JEE Advanced 2024 Paper 1

Keep practising — Wave Optics

The 8th bright fringe above the point O oscillates with time between two extreme positions. The separation between these two extreme positions, in micrometer ( m), is .

JEE Advanced 2024 Paper 2

The maximum speed in m/s at which the 8th bright fringe will move is .

JEE Advanced 2024 Paper 2

All Wave Optics PYQs →

PDFDownload Wave Optics PYQs as PDF Free, with answer key and a QR code to every solution — print it or study offline⬇

All JEE Advanced Physics chapters

Class 11Units and Measurements Motion in a Plane Laws of Motion Work, Energy and Power System of Particles and Rotational Motion Gravitation Mechanical Properties of Fluids Thermal Properties of Matter Thermodynamics (Physics)Kinetic Theory Oscillations Waves

Class 12Electric Charges and Fields Electrostatic Potential and Capacitance Current Electricity Moving Charges and Magnetism Electromagnetic Induction Alternating Current Electromagnetic Waves Ray Optics and Optical Instruments Wave Optics Atoms Nuclei Experimental Skills (Physics)