Which accurately explains concave and convex lenses?

A) With both concave and convex lenses, placement of the object dictates which side of the lense the image will appear.

B) With both concave and convex lenses, placement of the object does not dictate which side of the lense the image will appear.

C) With concave lenses, placement of the object does not dictate which side of the lense the image will appear, but with convex lenses, they do.

D) With convex lenses, placement of the object does not dictate which side of the lense the image will appear, but with concave lenses, they do.

Comedians like to joke that the reason we haven’t been visited by intelligent life from elsewhere in the universe is that aliens have been monitoring earth’s broadcasts of intellectually embarrassing tv programs, like gilligan’s island, fear factor, the jersey shore, and the jerry springer showand so consider us far too primitive to merit a visit. let’s check the assertion that aliens could have been receiving them. tv programs are broadcast at a frequency of about 100mhz with about 100kw of total power in 30frames per second, which emanatesroughly uniformly in all directions. assume that interstellar space transmits these broadcasts without attenuation. no matter how smart they are, aliens would require at least one photon per frame to interpret our signals. findthe number of photons per unit time per unit area reaching a receiver on a possible planet in the nearest star system, which is about 4 light-years away (a light-year is the distance light travels in a year). if aliens aimed a receiver or detector directly at earth, how big (in diameter) would it have to be to receive a photon per frame

In which of the following is positive work done by a person on a suitcase

Ajoint produces movement when its angle decreases. which type of movement is it?