True or False? A)Reflection is the description of the portion of a ray of light

Question

True or False?

A)Reflection is the description of the portion of a ray of light that remains in the medium from which it originated after striking the boundary of a different medium.

B)Refraction refers to the change in direction of the ray of light entering a new medium.

C)The angle of incidence equals the angle of refraction.

D)Angles in optics are measured with respect to the surface.

E)The intensity of the reflected beam is greater than the intensity of the incident beam.

F)The intensity of the refracted beam is always less than the intensity of the incident beam.

G)Light travels at a faster speed in a vacuum than it does in a medium.

H)Light refracts through air even though the index of refraction is 1.000.

I)The higher the index of refraction of a medium, the slower light moves within it.

J)The index of refraction of most materials depends on the wavelength of the light going through it.

K)In going from air into most materials at the same angle, a blue beam of light deviates more from its original direction than an orange beam.

L)In going from air into most materials at the same angle,  longer wavelength light refracts more than shorter wavelength light.

M)It is possible for a material to have a negative refractive index.

N)Snell’s Law gives the change in intensity of a beam of light when it travels from one medium to another.

O)Dispersion is the phenomenon of different colors having different indices of refraction in a material.

Explanation / Answer

A)TRUE

B)TRUE

C)FALSE

according to snell's law

u1sin i = u2sin r

r = sin-1((u1sin i ) / u2)

D)FALSE

Angles in optics are measured with respect to normal of the surface.

E)FALSE

The intensity of the reflected beam is equal to the intensity of the incident beam

F)TRUE

because it different refractive index

G)TRUE

H)TRUE

I)TRUE

J)FALSE

it is a material property

K)TRUE

blue has more deviation then orange

L)FALSE

In going from air into most materials at the same angle,  longer wavelength light refracts less than shorter wavelength light.

M)TRUE

N)FALSE

it gives the relation between incidence angle and refraction angle

O)TRUE

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