First of all, it is important to know that we are not talking about your camera when we refer to focal length. The camera of course plays an important role, but it is the job of thelensto take the light and focus it at a particular point. The light from the scene hits the object ...
The focal length is the distance from the mirror to the point where all light that bounces off of the mirror goes through. Concave mirrors have a positive focal length and convex mirrors have a negative focal length. Positive distances are ...
1求一下三道题的物理答案1.A concave mirror has a focal length of 43 cm. What is the position of the object if the image is erect and is 3 times larger than the object? Answer in units of ___cm.2.An object is placed 5.7 cmin front of a concave mirror with a 28 cm focal lengt...
Become a Study.com member to unlock this answer! Create your account View this answer Given: The object distance from the mirror is {eq}u = 20\;{\rm{cm}} {/eq}. The focal length of mirror is {eq}f = 100\;{\rm{cm}} {/...
Answer to: There is a 12 mm high object that is 10 cm from a concave mirror with a focal length of 17 cm. (a) Where (B) how high, and (C) what type...
数码相机中的广角镜头和长角,望角都是什么意思(Inadigitalcameraandawide-anglelenshorn,atwhatangle)1beforeintroducingwide-anglecameras,firstofall,knowthecamera'sfocallength.Infact,whenpeopletalkaboutthefocusofadigitalcamera,itisnottheactualfocusofthedigitalcamera,buttheequivalentfocallength,thatis,thefocallengthrel...
A concave lens with a more focal length. Two lens holders. One thick and one thin optical needle. A knitting needle. A half-metre scale. What is difference between concave mirror and concave lens? A concave mirror is opaque whereas aconcave lens is transparent. A concave mirror can form ...
Still, the In-Camera HDR function is a great feature because the camera controls everything. For example, with the In-Camera HDR function on the Canon 5D Mark III, we can use Mirror Lock-up, set the camera to a 2-second timer, and set our bracketing sequence with a number of frames...
The focus of a lens. Also called focal point. Focus See focal length. Focus A center of interest or activity "Precisely how diet affects E. coli in livestock is the focus of current research" (Cindy Engel). Focus Close or narrow attention; concentration "He was forever taken aback by [...
Answer to: The focal length of a smartphone camera lens is 2.5mm. What is the distance from that lens to the image of an object that is very...