Interference/Diffraction Shadows

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To determine the shadow length of a vertical stick in a flat-bottomed pool of salt water, first calculate the angle of the sun based on the initial shadow length in air. The stick, 1.8 m tall, casts a 1.2 m shadow, allowing for the calculation of the sun's angle. When placed in the pool, the stick's effective height is reduced due to the water's refractive index of 1.56, which alters the light's path. The new shadow length can be found using trigonometric principles and the modified height of the stick in water. Understanding these concepts is crucial for solving the problem accurately.
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Homework Statement


At 11:00hrs a vertical stick in air, 1.8 m long, casts a shadow 1.2 m long. If the same stick is placed at 11:00hrs in air in a flat bottomed pool of salt water half the height of the stick, how long is the shadow on the floor of the pool? (For this pool, n = 1.56.)


Homework Equations


Not sure...=/


The Attempt at a Solution


Don't know were to start >.<
 
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Aeighme said:
Don't know were to start >.<

Hi Aeighme! :smile:

Start by calculating the angle of the sun above the horizon. :smile:
 

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