Recent content by jmacmartin

  1. J

    Calculating Magnification with lens, an object, and a screen.

    Homework Statement A lens with focal length fo = 9 cm forms an image of an object placed a distance d=3.7fo to the left of the lens, onto a screen to the right of the lens. The distance L from object to image is fixed. The lens is now moved toward the screen a distance x until an image is...
  2. J

    How wide is a single slit that gives its first minimum at 90°?

    Sorry to waste your time with stupid questions. I will seek help elsewhere.
  3. J

    How wide is a single slit that gives its first minimum at 90°?

    Hi BvU, I do not know the answer to that question. No matter the angle, I'm not quite sure how to express it in a formula. I apologize if I have not asked my question in the proper form for this website. I know the equation øp=p(λ/a) will tell me where the dark bands are on the screen. I...
  4. J

    How wide is a single slit that gives its first minimum at 90°?

    Homework Statement How wide is a single slit that gives its first minimum at 90°? Homework Equations øp=p(λ/a) The Attempt at a Solution Not quite sure what the answer is looking for but I'd guess I would need to solve for "a." So... 90°=(λ/a) Is there any more...