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Home » The optical density of turpentine is higher than that of water while its mass density is lower. The figure shows a layer of turpentine floating over water in a container. For which one of the four rays incident on turpentine in the figure, the path shown is correct?a) 1b) 2c) 3d) 4
The optical density of turpentine is higher than that of water while its mass density is lower. The figure shows a layer of turpentine floating over water in a container. For which one of the four rays incident on turpentine in the figure, the path shown is correct?
a) 1
b) 2
c) 3
d) 4
CBSE | Class 12 | NCERT Exemplar | Physics | Ray Optics and Optical Instruments
The optical density of turpentine is higher than that of water while its mass density is lower. The figure shows a layer of turpentine floating over water in a container. For which one of the four rays incident on turpentine in the figure, the path shown is correct?
a) 1
b) 2
c) 3
d) 4

 

 

 

 

 

 

 

Answer:

b) 2

When light travels from (optically) rarer medium air to optically denser medium turpentine, it bends towards the normal, i.e., θ1 > θ2, but when it travels from optically denser medium turpentine to rarer medium water, it bends away from the normal.

i

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