- #1
cowgiljl
- 63
- 1
if a double concave mirror with a focal length f = -20 inches is used , where does the image seem to be located , if the image is 30 feet away from the lens
first i converted the 30ft to inches and got 360inches
used formula 1/p + 1/q = 1/f
.0028 + 1/q = -.05
1/q = -.053
q = -18.9 inches
is this correct
first i converted the 30ft to inches and got 360inches
used formula 1/p + 1/q = 1/f
.0028 + 1/q = -.05
1/q = -.053
q = -18.9 inches
is this correct