Question:
An object is placed in a medium of refractive index 3. An electromagnetic wave of intensity 6 × 10^8 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 × 10^8m/s) :
(1) 36 Nm^–2
(2) 18 Nm^–2 
(3) 6 Nm^—2 
(4) 2 Nm^–2
 

                                                       JEE-2024       

Solution:                
An object is placed in a medium of refractive index 3. An electromagnetic wave of intensity 6 × 10^8 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 × 10^8m/s) : (1) 36 Nm^–2 (2) 18 Nm^–2 (3) 6 Nm^—2 (4) 2 Nm^–2 JEE-2024

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