BIO Predict/Calculate Optical Activity Optically active molecules have the property of rotating the direction of polarization of linearly polarized light Many biologically important molecules have this property, some causing a counterclockwise rotation (negative rotation angle), others causing a clockwise rotation (positive rotation angle) For example, a 5.00 gram per 100 mL solution of l-leucine causes a rotation of −0550°; the same concentration of d-glutamic acid causes a rotation of 0.620° (a) If placed between crossed polarizers, which of these solutions transmits the greater intensity? Explain (b) Find the transmitted intensity for each of these solutions when placed between crossed polarizers The incident beam is unpolarized and has an intensity of 12.5 W/m2.
Want to see the full answer?
Check out a sample textbook solutionChapter 25 Solutions
Physics (5th Edition)
Additional Science Textbook Solutions
College Physics
Modern Physics
Conceptual Physical Science (6th Edition)
University Physics (14th Edition)
College Physics: A Strategic Approach (3rd Edition)
University Physics Volume 2
- Construct Your Own Problem Consider a space sail such as mentioned in Example 29.5 Construct a problem in which you calculate the light pressure on the sail in N/m2 produced by reflecting sunlight. Also calculate the force that could be produced and how much effect that would have on a spacecraft. Among the things to be considered are the intensity of sunlight, its average wavelength, the number of photons per square meter this implies, the area of the space sail, and the mass of the system being accelerated.arrow_forwardCertain sunglasses use a polarizing material to reduce the intensity of light reflected as glare front water or automobile windshields. What orientation should the polarizing filters haw to be most effective? (a) The polarizers should absorb light with its electric field horizontal. (b) The polarizers should absorb light with its electric field vertical. (c) The polarizers should absorb both horizontal and vertical electric fields. (d) The polarizers should not absorb either horizontal or vertical electric fields.arrow_forwardUnpolarized light passes through three polarizing filters. The first filter has its transmission axis parallel to the z direction, the second has its transmission axis at an angle of 30.0 from the z direction, and the third has its transmission axis at an angle of 60.0 from the z direction. If the light that emerges from the third filter has an intensity of 250.0 W/m2, what is the original intensity of the light?arrow_forward
- Unpolarized light passes through two Polaroid sheets. The transmission axis of the analyzer makes an angle of 53.0 with the axis of the polarizer. (a) What fraction of the original unpolarized light is transmitted through the analyzer? (b) What fraction of the original light is absorbed by the analyzer?arrow_forwardYou use a sequence of ideal polarizing niters, each with its axis making the same angle with the axis of the previous filter, to rotate the plane of' polarization of a polarized light beam by a total of 45.0. You wish to have an intensity reduction no larger than 10.0%. (a) How many polarizers do you need to achieve your goal? (b) What is the angle between adjacent polarizers?arrow_forwardUnpolarized light passes through two Polaroid sheets. The transmission axis of the analyzer makes an angle of 53.0 with the axis of the polarizer. (a) What fraction of the original unpolarized light is transmitted through the analyzer? (b) What fraction of the original light is absorbed by the analyzer?arrow_forward
- (a) What is me ratio of the speed of red light to violet light in diamond, based on Table 25.2? (b) What is this ratio in polystyrene? (c) Which is more dispersive?arrow_forward2) Light from a 50 W flashlight is incident on a mirror with 100% reflectivity. If the light covers 1 m of the mirror, what pressure does it exert on the mirror?arrow_forward2. State the significance of the cos20 in the expression for Malus's Law 3. Vertically polarised light of intensity 50Wm-2 is incident on a polarising filter whose axis is rotated 150 to the vertical. Calculate the intensity of transmitted light.arrow_forward
- 2. A magnetic field B= Bi+B,j+B_k whose components are Bx= Asin(ot-kx), By = Aykcos(ot-kx), B:= 0 is present in an uncharged, non-conducting medium of infinite extent, with permittivity, ɛ, and permeability, u, so can assume J=0. From Maxwell's equations determine the associated electric field. %3Darrow_forwardPhysics - Unit: Applications of the Wave Nature of Light Identify the three methods of polarizing light and state how optical activity of molecules ina solution can be detected using two polarizers?arrow_forwardWhich of the following statements is true for the direction of polarization for a polarized light wave? a. It is parallel to the direction of propagation and perpendicular to the direction of the electric field. b. It is perpendicular to the direction of propagation and parallel to the direction of the electric field. c. It is parallel to the directions of propagation and the electric field. d. It is perpendicular to the directions of propagation and the electric field.arrow_forward
- College PhysicsPhysicsISBN:9781938168000Author:Paul Peter Urone, Roger HinrichsPublisher:OpenStax CollegePhysics for Scientists and Engineers, Technology ...PhysicsISBN:9781305116399Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningPhysics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage Learning
- College PhysicsPhysicsISBN:9781305952300Author:Raymond A. Serway, Chris VuillePublisher:Cengage LearningCollege PhysicsPhysicsISBN:9781285737027Author:Raymond A. Serway, Chris VuillePublisher:Cengage LearningPrinciples of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning