A student is given an assignment to demonstrate diffraction. He takes a photograph of a straw in a glass of water. The straw app
ears bent at the water level. Which best describes this example? A)This is a good example of diffraction.B)This is an example of dispersion and not diffraction.C)This is an example of refraction and not diffraction.D)This is an example of reflection and not diffraction.
Answer: C) This is an example of refraction and not diffraction.
Explanation: The reason for the straw to appear bent at the water's surface is because of the process of refraction. Light travels at different speeds in different medium because of the varying densities.
The light travels from air to water and thus the difference in speed results in an apparent shift of the position of part of straw under water and thus the part appears broken.
Reflection is the the return of sound or light energy from the surface without absorbing it.
Diffraction is the phenomenon which occurs when the wave encounters an obstacle.
A.) <span>If no unbalanced force acts upon the house of cards, then it will remain standing forever.
[ Other Statements doesn't make any sense in Physics, they can be true in some situation & can't be false, option A is the only answer ] Hope this helps!</span>
