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Physics - optics jee mains 2024

 Q. An object is placed in a medium of refractive index 3. An electromagnetic wave of intensity 6 × 108 W/m² falls normally on the object and it is absorbed completely. The radiation pressure on the object would be (speed of light in free space = 3 × 108 m/s) :

                                                        (jee mains 2024)

1. 36 Nm-²


2. 18 Nm-²


3. 6 Nm-²


4.  2 Nm-²

(3) - 

Radiation pressure = I /V

= Ιμ/C 

=6×108×3/3×108 

= 6 N/m²

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