Please help me?

Question

A convex spherical mirror with a radius of curvature of 17.0 cm produces a virtual image one half the size of the real object. Where is the object?
cm (from the mirror)

Answer 1

i believe when one comes across a mirror like that, the person standing in front of the mirror is the object.

Answer 2

for mirrors, the mirror formula is given by
1 / v + 1 / u = 1 / f....1)


The ratio of the height of the image to the height of the object is known as the magnification.
M = h2 / h1 = v / u
since h2 = h1/2
hence v = u/2
substitute in 1)
2 / u + 1 / u = 1 / f
3/u=1/f
u=3f = 54cm in front of mirror

Answer 3

Abstract A multispectral imager has been developed for a rendezvous mission with the near-Earth asteroid, 433 Eros. The Multi-Spectral Imager (MSI) on the Near-Earth Asteroid Rendezvous (NEAR) spacecraft uses a five-element refractive optical telescope, has a field of view of 2.93 × 2.25°, a focal length of 167.35 mm, and has a spatial resolution of 16.1 × 9.5 m at a range of 100 km. The spectral sensitivity of the instrument spans visible to near infrared wavelengths, and was designed to provide insight into the nature and fundamental properties of asteroids and comets. Seven narrow band spectral filters were chosen to provide multicolor imaging and to make comparative studies with previous observations of S asteroids and measurements of the characteristic absorption in Fe minerals near 1 µm. An eighth filter with a much wider spectral passband will be used for optical navigation and for imaging faint objects, down to visual magnitude of +10.5. The camera has a fixed 1 Hz frame rate and the signal intensities are digitized to 12 bits. The detector, a Thomson-CSF TH7866A Charge-Coupled Device, permits electronic shuttering which effectively varies the dynamic range over an additional three orders of magnitude. Communication with the NEAR spacecraft occurs via a MIL-STD-1553 bus interface, and a high speed serial interface permits rapid transmission of images to the spacecraft solid state recorder. Onboard image processing consists of a multi-tiered data compression scheme. The instrument was extensively tested and calibrated prior to launch; some inflight calibrations have already been completed. This paper presents a detailed overview of the Multi-Spectral Imager and its objectives, design, construction, testing and calibration(maybe?!)Hope this helps

Answer 4

not enough info, how big is the image in the mirror?