Question

for the activity to demonstrate refraction using metal wheel fixed with two straws kept immersed in a water trough. we get two straws in a straight line when?
a) placed perpendicular to the water surface.
b) kept parallel to the water surface.
c) kept at an inclination 45
d) it is not possible to get in a straight line
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Answer 1

Answer:

a) placed perpendicular to the water surface.

Explanation:

demonstrate refraction using metal wheel fixed with two straws kept immersed in a water trough.

Answer 2

Answer:

When the straws are placed perpendicular to the water surface, we get the two straws in a straight line.

Explanation:

• When a stick or a straw is immersed in water, it appears bent due to the refraction of light
• As light travels from a rare medium, air to a denser medium,  water, which has a higher refractive index, the speed of light decreases in the denser medium
• As a result, the part below the water surface appears bent at the interface
• However, when the straw is perpendicular to the surface of the water, the straw appears in the same line

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