Imagine an isothermal, completely gas-based atmosphere with an absorption coefficient of 0.03 m^2kg^-1 across all wavelengths.  A)Find the height at which the maximum rate of absorption of a radiation beam oriented at a 30 angle from the zenith occurs. Assume that the scale height is H = 10 km and that the surface pressure is 100 × 10^3 Pa. B) Compute the height above which 80% of the incoming radiation is absorbed

In the equation, A = ebc, what quantity is represented by e? Molar Absorbtivity. Transmittance. Concentration.

When ultraviolet radiation of wavelength 400 nm passes through 2.50 mm of a solution of an absorbing substance at a concentration 0.717 mmol dm−3, the transmission is 61.5 per cent. Calculate the molar absorption coefficient of the solute at this wavelength. Express your answer in square centimetres per mole (cm2 mol−1).

4. (Part A When ultraviolet radiation of wavelength 400nm passes through 2.50 mm of a solution of an absorbing substance at a concentration 0.717 mmol/dm?, the transmission is 61.5%. Calculate the molar absorption coefficient of the solute at this wavelength. (Part B A molecular absorption transition has a molar absorption coefficient (extinction coefficient) of 60,220 dm/mole cm. What is the absorption cross-section in cm?/molecule?

Describe how the attenuation of X-rays correlate with i) their photon energy, ii) the chemical make-up of the transmission material, and iii) the distance they have travelled through the material.

5. A 7.25x104 M solution of Potassium cyanide (KCN) has a transmittance of 45.2% when measured in a 2 cm cell at a wavelength of 525 nm. Calculate (a) the absorbance of this solution; (b) the molar absorptivity of KMNO4.

The percent transmission, % T, is defined as follows. percent transmission = х 100% 1, = intensity of the light entering the sample | intensity of the light leaving the sample sample If the sample absorbs no light, I = lo, the percent transmittance will be equal to 100%. If the sample absorbs the light completely, I = 0, the percent transmittance will be equal to 0. Thus, the greater the amount of light absorbed by the sample, the smaller the percent transmittance. You are given the following solutions, E will have the lowest %T and A will have the lowest absorbance. The lambda max for these solution should be around 620 nm. А В D E

The molar absorption coefficient of a solute at 540 nm is 386 dm3 mol−1 cm−1. When light of that wavelength passes through a 5.00 mm cell containing a solution of the solute, 38.5 per cent of the light was absorbed. What is the molar concentration of the solute?

The percentage transmittance of light at 250 nm through a certain aqueous solution is 20.0% at 25°C. The experimental cell length is 1.0 cm, and the concentration of the solution is 5 × 10-4 mol L-1 . Calculate the absorbance.Calculate the molar absorption coefficient.

In a photochemical experiment it is observed that 5.78×10-5 mol of uranyl oxalate is decomposed at a wavelength of 300 nm emitted by a lamp in one hour. When acetone was irradiated with the same lamp for 10 hours, the amount of acetone decomposed was found to be 2.32× 10-4 mol. What is quantumyield for the acetone decomposition under the same condition?