Physics, 17.10.2021 14:40, nyce36

If a filter material has an absorption coefficient, α = 120m-1 for a given wavelength, how thick should the filter be for it to show a transmittance of 50%? (Assume that reflection losses at the front and rear faces are negligible, and that incidence is perpendicular).

Answers: 3

Show answers

Other questions on the subject: Physics

Physics, 21.06.2019 23:30, schapethan

In order for the bug to fly through the air a force has to push the bug forward. identify this force. how does the bug produce

Answers: 1

continue

Physics, 22.06.2019 00:00, madskate9993

During physical science, ms. greene challenged her students to produce an energy transformation. james and jill wrapped a 4-inch nail with a coil of fifty turns of wire. they connected one end of the coil to one terminal of a knife switch. they connected the other terminal of the knife switch to the battery. finally, they connected the end of the coil to the other terminal of the battery. james held the tip of a 1-inch nail near the flat end of the 4-inch nail. jill closed the knife switch quickly and then opened it. the 1-inch nail was pulled toward the 4-inch nail. what is the best explanation of why the nail moved? a) electrical energy was converted to mechanical energy in the 1-inch nail. b) the 4-inch nail became an electromagnet and the magnetic force attracted the 1-inch nail. c) the electric current in the 4-inch nail was converted to mechanical energy in the 1-inch nail. d) the 4-inch nail had a positive charge and the 1-inch nail had a negative charge. opposites attracted.

Answers: 1

continue

Physics, 22.06.2019 14:00, 6224968918

Select for each of the following statements whether it is correct or incorrect. (a) in an isothermal expansion of an ideal gas. (b) the temperature remains constant. (b) the pressure remains constant. (c) there is work done by the gas. (d) there is heat added to the gas. (e) the change in internal energy equals zero.

Answers: 1

continue

Physics, 22.06.2019 15:00, koranbutterton

Astudent throws a water balloon with speed v0 from a height h = 1.76 m at an angle θ = 21° above the horizontal toward a target on the ground. the target is located a horizontal distance d = 9.5 m from the student’s feet. assume that the balloon moves without air resistance. use a cartesian coordinate system with the origin at the balloon's initial position. (a) what is the position vector, rtarge t, that originates from the balloon's original position and terminates at the target? put this in terms of h and d, and represent it as a vector using i and j. (b) in terms of the variables in the problem, determine the time, t, after the launch it takes the balloon to reach the target. your answer should not include h. (c) create an expression for the balloon's vertical position as a function of time, y(t), in terms of t, vo, g, and θ. (d) determine the magnitude of the balloon's initial velocity, v0, in meters per second, by eliminating t from the previous two expressions.

Answers: 3

continue

Do you know the correct answer?

If a filter material has an absorption coefficient, α = 120m-1 for a given wavelength, how thick sho...