Recent content by hardwork

Homework Statement In a double slit experiment, the wavelength is 740nm, the slit separation is 0.140mm, and the screen is 48.0cm away from the slits. What is the linear distance between adjacent maxima on the screen? Please check my answer. Homework Equations dy/L = m*wavelength...

Anyone?

Homework Statement Light of wavelength 547nm is incident perpendicularly on a soap film (n=1.31) suspended in air. What is the smallest nonzero film thickness for which reflected light undergoes constructive interference?Homework Equations 2t = (m + 1/2)(wavelength/nfilm)The Attempt at a...

Homework Statement Without her contact lenses, Kat cannot clearly see an object more than 70.0cm away. What should be the focal length of her corrective contact lenses?Homework Equations 1/f = 1/p + 1/qThe Attempt at a Solution 1/f = 1/infinity + 1/-70.0cm = -0.0143cm f = -70.0 cm Would anyone...

woohoo!

Homework Statement An object is in front of a lens with a focal length of -15cm. An image ½ the side of the object is formed. How far is the object from the lens?Homework Equations m - magnification q - distance from image p - distance from object f - focal length m = -q/p 1/p + 1/q = 1/fThe...

Thanks! I'll try it again: (1.00) (sin 35) = (1.84) (sin θ) θ = 18.2 degrees (1.84) (sin 18.2) = (1.61) (sin θ) θ = 20.9 degrees

Would I just use sin 35 then? I'm confused. :frown:

Homework Statement The figure (http://i43.tinypic.com/2dt5e2e.jpg") shows a ray of light traveling through a gas (n = 1.00), a solid (n = 1.84), and a liquid (n = 1.61). What is the angle θ made by the ray as it enters the liquid? Homework Equations (n1)(sin θ1)=(n2)(sin θ2)The Attempt at a...

b) I = (7.5W/m^2)(cos 65)^2 = 1.3 W/m^2 Thank you for your help today!

Homework Statement Unpolarized light has intensity 15W/m^2 and is incident on a sheet of polarizing material whose transmission axis makes an angle of 25 degrees with the vertical. A second polarizer, whose transmission axis is horizontal, is located just past the first. (a) What is the...

Oh, right. Thank you! B = 5.7 x 10^-6 T out of page

Homework Statement Two long straight wires each carry 3.4 A of current and are crossed, as shown in the figure. If Dh=12.0cm and Dv=6.0cm, what is the magnitude and direction of the magnetic field at A? Figure: http://i41.tinypic.com/4louv6.jpg"Homework Equations B=(Mu)(I)/(2pie)(r)The Attempt...

That was very helpful. Thanks, again!

cos^2(theta) = 0.8 then take the sqrt of both sides? cos(theta) = 0.9 cos-1(theta) = 26 degrees Angle: 26 + 18 = 44 degrees ... I hope. :redface: