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- True or false? A. Phosphorescence occurs at higher energy then fluorescence. B. Fluorescence occurs at longer wavelengths than phosphorescence. C. Fluorescence occurs at shorter wavenumbers than phosphorescence.Br2 Light NBS Light ||The units for absorbance are: Select one: Mol L. a. b. It does not have units. -1 -1 c. Mol L min". d. Mol L.
- Choose the one answer that fits best. Which of the following statements regarding a standard curve is NỘT correct? A standard curve a. Often uses a best fit trend line through the data points O b. Is a graph that shows absorbance readings of a number of standards O c. Is often used in Biology to compare unknown samples to O d. Is a graph that shows Absorbance on one axis and concentration on the other O e. Is created by measuring concentrations of a solution in a spectrophotometer directly.What is the energy of light having each characteristic? a v=6.031014s1 b =9.27nm c v=4320cm1 d =5.69Which of the following are true regarding phosphorescence and fluorescence? Read through all before making your one selection. A. Phosphorescence occurs at a lower frequencies than fluorescence B. Fluorescence occurs at longer wavelengths than phosphorescence. C. Fluorescence occurs at shorter wavenumbers than phosphorescence. D. B and A E. A and C F. All the above are true G. None of the above are true
- 3.3 Electromagnetic Spectrum We can use the equation f = c/ A to relate frequency (f), speed of light (c), and wavelength (A) together. Note: c is a constant (the speed of light) and is equal to 3.00 x 10 m/s 1. Fill in the table below Visible Light Red Orange Yellow Green Blue Indigo Violet Region Radiowave Microwave Infrared (IR) Visible (VIS) Ultraviolet (UV) f=c/A c = 3.00 x 10 m/s X-ray Gamma ray Frequency (f) (s¹) Wavelength (A) (m) 650. x 10 m 5.08 x 1014 S-1 5.88 x 10¹4 s1 7.50 x 10¹4 S-¹ 570. x 10-ºm Table 1: Regions of the electromagnetic spectrum Wavelength (A) Range 3x10³ m 3x10-¹ m 475. x 10 m 445. x 10 m 3x10¹ m-1x10³ m 1x10³ m-8x10-7 m 8x107 m-4x10-7 m 4x10 m-1x10-8 m 1x10 m-1x10-10 m < 1x10-10 m Electromagnetic Spectrum: Fill in the following chart below. Use the tables on the previous pages to help! 1. Label boxes "a-g" with the correct "region". 2. Color each box in the "visible" region the correct color using colored pencils or markers. 3. Fill in a frequency (f)…oger str tur :O: 3DRed light has a _____ frequency and a _____ wavelength than ultraviolet rays.
- Does absorbance increase or decrease as the solution concentration of the absorbing substance increases? A. stays the same B. decreases C. increasesGiven that the percent transmittance of light through a sample was 27.6% what is the absorbance of the solution? Rounded to two sig figs.Br₂ heat or light Br
