2.DVD players use red lasers with a wavelength of 650 nm, while Blu-ray players use blue lasers (hence the name) with a wavelength of 405 nm.
1. Which color would need a larger double slit spacing d to produce an interference pattern that has the first maxima 1 mm from the central bright spot?

Blue light

Explanation:

For maxima interference we have the relation

where

m =  order

d = Slit gap

we have the relation

y = First maxima =  1 mm (fixed)

D = Distance to screen = 1 m (fixed)

So, the wavelength needed should be larger.

Hence, the blue light which has higher wavelength of 650 nm is to be used as it requires larger double slit spacing.

nec chapter 5 contains

c. information on special occupancy areas

nec chapter 6 covers

a. special equipment

which of the following rules contain the words shall or shall not and must be adhered to?

b. mandatory rules

which of the following rules identify actions that are allowed but not required and typically cover options or alternative methods?

c. optional rules

which of the following serves as the introduction to the nec and provides an overview of the book?

a. nec article 90

organizations that test products for safety are

c. nrtls

the nec is published by the

a national fire protection association

the nec is divided into

b. 9 chapters

the nec provides informative annexes for

c. informational materials and examples

two terms from nec article 100 that trainees should become familiar with are

b. labeled and listed

explanation:

probably not the "magnets"in the magnet, so to speak, are thought to be electrons orbiting in shells. vurrent loops two sides to the loop