A) Consider the following statements and consider which are true and which are f

Question

A)

Consider the following statements and consider which are true and which are false.

A)White light that is reflected from some ordinary surface will be separated into a visible spectrum.
B)Total internal reflection is possible when light approaches (with sufficiently large angle of incidence) a boundary with a different medium that has a higher index of refraction.
C)Light travels faster in glass than it does in a vacuum.
D)When light enters a medium with a lower index of refraction, the ray is bent closer to the line normal to the boundary.
E)If one stands by a swimming pool, a person standing in the pool will seem to have short legs.

B)

In the above figures f is located at the focal point of the lens. (True or False)

A) An object placed between f and the lens in Fig. a results in an image on the left side of the lens.
B) An object placed to the left of f in Fig. a produces a virtual image.
C) An object placed between f and the lens in Fig. a produces a virtual image.
D) The lens in Fig. a is a diverging lens.
E) An object placed to the left of f in Fig. a results in an image on the right side of the lens.

Explanation / Answer

A)
White light that is reflected from some ordinary surface will be separated into a visible spectrum. (True, The white light enters a prism, and separates into the different colors of the visible spectrum.)

B)
Total internal reflection is possible when light approaches (with sufficiently large angle of incidence) a boundary with a different medium that has a higher index of refraction. (True , The angle should be greater than the critical angle.)

C)
Light travels faster in glass than it does in a vacuum. (False, Velcocity of light in medium is given by, v = c/n , Where n is refractive index of material and c is speed of light in vaccum.)

D)
When light enters a medium with a lower index of refraction, the ray is bent closer to the line normal to the boundary. (False, It bends away from the normal.)

E)
If one stands by a swimming pool, a person standing in the pool will seem to have short legs. (True, Due to refraction.)

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