What is the diameter of the needle

Assignment Help Physics

Reference no: EM13287541

You find an unlabeled box of fine needles, and want to determine how thick they are. A standard ruler won't do the job, since all you can tell is that each needle is less than a millimeter thick. So to find the thickness, you use the needle to poke a hole in a piece of brown construction paper. Then you arrange your 670 nm laser pointer to shine through the hole, and a circular diffraction pattern, consisting of a central bright circle surrounded by alternating dark and bright rings, appears on the wall 20.7 m away. Now you can use your ruler to measure that the central bright circle is 10.2 cm in diameter. What is the diameter of the needle? Please explain your work and the equation that you used. THe answer is in micrometers

Reference no: EM13287541

Questions Cloud

What is the probability of an electron state being occupied : (A)Under equilibrium conditions and T= 0 Kelvin ,what isthe probability of an electron state being occupied if it is located at the Fermi level (B) If Ef is positioned at Ec,determine(numerical answer required) the probability of findingelectrons in..

What coupon rate should the company set on its bonds : If a company would like to issue some semiannual coupon bonds at par. Comparable bonds have a current yield of 8.16 percent, an effective annual yield of 8.68 percent, and a yield to maturity of 8.50 percent. What coupon rate should the company se..

Explain the relevance of your answer in terms of firm value : Assuming that the ROIC is expected to remain constant in Year 3 and beyond, what is the Year 0 value of operations, in millions? Note that, you must first find the horizon, or terminal, value.

Explain how many grams of product will form : 20.0 mL of 0.250 M calcium nitrate are mixed with 25.0 mL of 0.150 M potassium nitrate. How many grams of product will form

What is the diameter of the needle : You find an unlabeled box of fine needles, and want to determine how thick they are. A standard ruler won't do the job, What is the diameter of the needle

How large a sales increase can the company achieve : Bannister's profit margin is 5% and its payout ratio is 60%. How large a sales increase can the company achieve without having to raise funds externally?

What is his displacement on the walk home : The school bus picks up Brian in front of his house and takes him on a straight-line 3.6 km bus ride to school in the positive direction. what is his displacement on the walk home

Express the voting logic function in a truth table : A minority voting circuit makes a decision based on the minority of votes. The logic receives THREE inputs x, y, and z.Together, these input variables are the binary representation ofthe number of members who vote "yes" out of 7 total members.

Which the firm investment bankers have recommended : Data for use in the forecast are shown below. However, the CEO is concerned about the impact of a change in the payout ratio from the 10% that was used in the past to 50%, which the firm's investment bankers have recommended.

User Account

All Pages