A Beka: Physics Quiz 29

What instrument employs either a prism or a diffraction grating to study visible light?

spectrometer

What is defined as the darkest region of a shadow?

umbra

The treatment of light as wave motion is called ? .

wave optics

The ? maximum appears directly behind the middle slit of a multiple slit diffraction screen.

zeroth-order OR central

When a plano-convex lens lies upon a glass pane and is illuminated by monochromatic light, a pattern of light known as ? is formed.

Newton's rings

In order for an observer to see a rainbow, the sun must be ? the observer.

behind

What phenomenon occurs because of the dispersion of white light?

chromatic aberration

What is defined as the spreading out of light beyond a barrier?

diffraction

After light has passed through a slot diffraction screen, diffraction ? appear as alternating regions of light and darkness.

fringes

What is the name given to the most conspicuous of the four rainbows?

primary bow