Physics, 29.08.2020 23:01, tannerroland
A converging lens is symmetric; its curved sides have radii of 50 cm. If the focal length is to be 80 cm, what should the index of refraction be
Answers: 2
Physics, 21.06.2019 18:10, eweqwoewoji
Scientists use laser range-finding to measure the distance to the moon with great accuracy. a brief laser pulse is fired at the moon, then the time interval is measured until the "echo" is seen by a telescope. a laser beam spreads out as it travels because it diffracts through a circular exit as it leaves the laser. in order for the reflected light to be bright enough to detect, the laser spot on the moon must be no more than 1.0 km in diameter. staying within this diameter is accomplished by using a special large-diameter laser. part a if λ = 540nm , what is the minimum diameter of the circular opening from which the laser beam emerges? the earth-moon distance is 384,000 km. express your answer to two significant figures and include the appropriate units.
Answers: 1
Physics, 22.06.2019 01:00, blesskids600
An incident ray through the focal point of a spherical mirror will: reflect through the center of curvature. reflect back through the focal point. reflect parallel to the principle axis. reflect the same direction as the incident ray.
Answers: 1
A converging lens is symmetric; its curved sides have radii of 50 cm. If the focal length is to be 8...
Mathematics, 05.05.2020 22:18
History, 05.05.2020 22:18
Biology, 05.05.2020 22:18
Chemistry, 05.05.2020 22:18
Biology, 05.05.2020 22:18
Mathematics, 05.05.2020 22:18