A question about the diameter of a camera's aperture...?
A spy camera is said to be able to read the numbers on a car's license plate. If the numbers on the plate are 3.4 cm apart, and the spy satellite is at an altitude of 120 km, what must be the diameter of the camera's aperture? (Assume light with a wavelength of 550 nm.)
mastering physics. hopefully you figure it out. because i need help too
xSparkage FAQ: Techs! (cameras, lighting, etc)
|
|
Nightwatcher NW200 Robotic Security Light, Black £61.99 Fixed PIR lamps which just light up aren't really a deterrent to the determined intruder but the Nightwatcher security light is unique because it actually follows the intruder, giving them the clear impression that they are being watched. The Nightwatcher motorised security light has a massive 220-degree coverage. The unit detects movement and the light follows it with a powerful yet energy-effici... |
|
|
Nightwatcher NW300 Robotic Security Light with Dummy Camera and Wireless Alarm, White £84.99 ... |
|
|
Nightwatcher NW300 Robotic Security Light with Wireless Alarm, White £79.95 Fixed PIR lamps which just light up aren't really a deterrent to the determined intruder but the Nightwatcher security light is unique because it actually follows the intruder, giving them the clear impression that they are being watched and in fact the NW300 has a wireless alarm included, which can be kept inside the house and sounds a warning when the motion sensor is activated. The Nightwatcher... |
|
|
Lights, Camera, Revolution £7.99 ... |
|
|
What's New Scooby Doo : Vol 3 - Lights, Camera, Mayhem [DVD] £1.92 ... |
|
|
Lights, Camera, Doo Wop! £6.45 ... |
|
|
Angelina Ballerina - Lights, Camera, Action! [VHS] £0.34 ... |
|
|
Los Angeles-Lights & Camera [VHS] [1989] £12.99 ... |
|
|
Color Bar, A4 21x30 cm, 250 g, 10 sheet Color Bar, A4 21x30 cm, 250 g, 10 sheet, beige... |
|
|
Byron - CS11D Dummy CCTV Camera Unit £6.95 Byron CS11D Wall Mounted Dummy Camera BYRCS11D Dummy camera with warning LED for indoor and outdoor use. Supplied with cable and mounting bracket. Requires 1 x 1.5V (C size) battery (not included). BYRCS11D... |
Tags: camera · camera light metering system · camera lights · camera lights action · camera's light meter · camera's light sensor · exposure · photography · photoshop · videoNo Comments
0 responses so far ↓
Like gas stations in rural Texas after 10 pm, comments are closed.