Short wavelengths of visible light interact more frequently with the atoms in glass than do longer wavelengths. Does this interaction time tend to speed up or to slow down the average speed of short-wavelength light in glass?

Slow down

Explanation:

Short wavelengths of visible light interact more frequently with the atoms in glass than do longer wavelengths.

This means that blue light (shorter wavelength) interacts more frequently with the atoms in glass, with respect to red light (longer wavelength).

More interactions, however, means that the speed of the light decreases more. Therefore, blue light is slowed down more than red light.

This can be seen from the formula of the refractive index:

where

c is the speed of light in a vacuum

v is the speed of light in the medium (here, glass)

The index of refraction can also be written as

where

is the wavelength of light in a vacuum

is the wavelength in the medium

Therefore, since the two "n" are equals, this means that when light interacts more with the medium, its speed is decreased more, and so light with short wavelength is slowed down more.

  the grams     of oxygen gas   that can be produced     is 20.6   grams of o₂

calculation

2liclo₃ →   2 licl + 3 o₂

step 1:   find the moles of liclo₃

moles = mass÷ molar mass

from periodic table the molar mass of liclo₃ =6.9 +35.5   +(16 x3) =90.4 g/mol

moles=38.7 g÷90.4 g/mol=0.4281   moles

step 2:   use the   mole ratio   to calculate the moles of o2

from equation above, liclo₃: o₂   is 2: 3  

therefore the moles of   o₂=0.4281 moles x3/2 =0.6422   moles

step 3: find mass   of o₂

mass= moles x molar mass

from periodic table the   molar mass of   o₂ = 16 x2= 32 g/mol

mass=0.6422   moles   x   32 g/mol = 20.6 grams of o₂