Two students, Francis and Dalton, make single-slit slides in order to see the Fraunhofer diffraction pattern themselves. Francis makes a slide with a slit of size a. Dalton's hand slips when she's making the slit, and winds up with a slit twice as wide as her classmate's. They both use the same monochromatic light filtered by their respective slides to project a diffraction pattern on screen a
distance L away. The distance between fringes on Francis' will be
1.two times greater than that on Dalton's.
2.the same as the spacing on Dalton's.
3.half that of Dalton's.
4.some size smaller than Dalton's.
1
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The terrestrial planet with the most moons is ____________________
Fill in the blank(s) with correct word
An experiment was done where a "primordial soup" of water, methane, carbon dioxide and ammonia was electrified. Following this, the material was found to contain many of the amino acids found in all living things on Earth
The purpose of this experiment was to: A) determine whether DNA could have formed from electrolysis. B) determine whether DNA could have formed from amino acids. C) determine whether DNA could have formed from water and methane. D) determine whether amino acids could have formed naturally on Earth. E) determine whether amino acids could have formed from water, methane, carbon dioxide and ammonia.
Heating due to the greenhouse effect is caused by the fact that our atmosphere lets
A. infrared wavelengths in but prevents heat loss at visible wavelengths B. visible light through but prevents heat loss at longer (infrared) wavelengths C. visible light through but prevents heat loss at shorter (ultraviolet) wavelengths
A person wearing snowshoes can walk across a blanket of freshly fallen snow without sinking far into the snow because
A. the large area of the snowshoe concentrates the force of the person to a point smaller than the foot. B. snowshoes cover a larger area than a foot and so the pressure is reduced. C. snowshoes push less dense snow out of the way so the person stands on more solid ice below. D. the snowshoes reduce the force of the person on the snow.