Results 1 to 3 of 3

Math Help - Laser problem

  1. #1
    Junior Member
    Joined
    Nov 2009
    Posts
    50

    Laser problem

    I was wondering if someone could just check my answer on this one.

    A laser is pointed horizontally at a wall that stretches on to infinity perpendicular to the path of the laser. The angle of the laser in relation to the wall changes at a constant rate, R. The distance between the laser and the wall is D. Assuming the light travels instantaneously what is the apparent acceleration of the dot the laser makes on the wall as a function of time?

    I got:
    A(t)=2DR^2sec^2(Rt)tan(Rt)
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Grand Panjandrum
    Joined
    Nov 2005
    From
    someplace
    Posts
    14,972
    Thanks
    4
    Quote Originally Posted by Keithfert488 View Post
    I was wondering if someone could just check my answer on this one.

    A laser is pointed horizontally at a wall that stretches on to infinity perpendicular to the path of the laser. The angle of the laser in relation to the wall changes at a constant rate, R. The distance between the laser and the wall is D. Assuming the light travels instantaneously what is the apparent acceleration of the dot the laser makes on the wall as a function of time?

    I got:
    A(t)=2DR^2sec^2(Rt)tan(Rt)
    That looks right.

    CB
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Junior Member
    Joined
    Nov 2009
    Posts
    50
    And R would have to be in radians per second not degrees correct?
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Laser question. Have no clue how to do this.
    Posted in the Math Topics Forum
    Replies: 4
    Last Post: September 6th 2010, 02:36 PM
  2. Replies: 6
    Last Post: November 18th 2009, 07:35 PM
  3. Laser Sails (astrophysics)
    Posted in the Advanced Math Topics Forum
    Replies: 0
    Last Post: September 30th 2009, 07:37 PM
  4. Aim laser canon on an incline
    Posted in the Differential Geometry Forum
    Replies: 0
    Last Post: December 16th 2008, 07:53 AM
  5. The laser used in cornea
    Posted in the Advanced Applied Math Forum
    Replies: 1
    Last Post: August 16th 2006, 08:25 PM

Search Tags


/mathhelpforum @mathhelpforum