physics

posted by .

(1) If an electromagnetic wave has a period of 4.8 μs, what is the frequency and wavelength?

I know how to find the frequency but for the wavelength how can we find it without the velocity being given????

(2) The beam of a helium-neon laser (λ = 632.8 nm) is incident on a slit of width 0.085 mm. A screen is placed 95.0 cm away from the slit. How far from the central band is the first dark band? If the slit was two times wider, would the first dark band be closer or farther form the central band?

  • physics -

    1. Since is is an electromagnetic wave, the velocity is c = 3.0*10^8 m/s

    2. Use the single slit diffraction equation.

    http://hyperphysics.phy-astr.gsu.edu/hbase/phyopt/sinslit.html

    The first dark band is at an angular distance ë/d from the central bright band. Doubling the slit width decreases the band separation distance by half.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Physics (please help)

    A sinusoidal wave travels along a string. The time for a particle to move from maximum displacement to zero is 0.170s. What are the a)period b)frequency c) the wavelength is 1.40m what is the wave speed?
  2. Physics

    How do you calculate the wave speed of waves that are 0.15 m apart, and have a frequency of 2 Hz?
  3. Physics

    Light is an electromagnetic wave and travels at a speed of 3.00 108 m/s. The human eye is most sensitive to yellow-green light, which has a wavelength of 5.58 10-7 m. What is the frequency of this light?
  4. Physics

    Medical x rays are taken with electromagnetic waves having a wavelength around .1 nm. What are the frequency, period, and wave number of such waves?
  5. Physics

    1)An electromagnetic wave has a wavelength of 6.2 x 10^14 n. What is the frequency of the wave?
  6. Physics (Simple Frequency Question) Reply SOON!

    I know that... wavelength = velocity * frequency frequency = velocity/wavelength If I have the voltage and the wavelength, does the voltage count as the velocity to find the frequency?
  7. PHYSICAL SCIECE

    A seismic wave has a velocity of 5000 m/s and a frequency of 4Hz. wht is the wavelength of this wave?
  8. 7th grade Science

    What is the relationship between energy and the wavelength of an electromagnetic wave?
  9. Chemistry

    A sample of light has a wavelength of 2.61 x 10^-12 m. What is it's frequency?
  10. Physics help

    a wave with a frequency of 3.1 hz and a wavelength of 0.3 meters experiences a lengthening of wavelength to 2.6 meters what is the new frequency of this wave?

More Similar Questions