Physics, 15.04.2020 04:54, engbarthcobie
Irina finds an unlabeled box of fine needles, and wants to determine how thick they are. A standard ruler will not do the job, as each needle is less than a millimeter thick. So, to find the thickness, she uses a needle to poke a hole in a piece of brown construction paper. Then, she positions a 657 nm 657 nm laser pointer to shine through the hole and project a circular diffraction pattern on a wall 23.7 m 23.7 m away. She then uses her ruler to measure that the central bright circle is 16.2 cm 16.2 cm in diameter. What diameter does Irina calculate for the needle?
Answers: 2
Physics, 22.06.2019 03:00, iicekingmann
Classify each possible hypothesis about a medicinal aloe vera plant as falsifiable or non-falsifiable. aloe vera gel is the best natural skin moisturizer. aloe vera gel can heal wounds by boosting cell renewal. aloe vera juice tastes better than carrot juice. drinking aloe juice can reduce the risk of lung cancer.
Answers: 1
Irina finds an unlabeled box of fine needles, and wants to determine how thick they are. A standard...
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