What is the size of a spot on the recording surface of a CD if the wavelength of the laser light is 780 nm and the numerical aperture is 0.45?
What will be an ideal response?
The approximate spot size is given by 1.22?/NA = 1.22 x 780 x 10?9/0.45 = 2,115 nm (2.115 ?m)
You might also like to view...
There is no limit to the number of ____ elements used within a Web page.
A. mime B. type C. script D. jscript
With the Free Transform Tool, ____ a corner to adjust that corner.
a. SHIFT+DRAG b. CTRL+DRAG c. ALT+DRAG d. ESC+DRAG
Case-Based Critical Thinking QuestionsCase 1-2As Cassie begins to develop her first Web site, she has lots of practical questions for her sister Shakira, who has been developing sites for many years. Against her sister's advice, Cassie used Windows Explorer (not Dreamweaver) to move the home page to her Web site, which appears to have broken all of the links to the page. Shakira tells her that this is because Dreamweaver inserts what kind of paths when she created hyperlinks to the home page?
A. dynamic B. absolute C. relative D. static
The form ____ attribute is the part of the form tag that specifies how the data in the form will be processed.
A. processing B. scripting C. end D. action