Also make sure you have access to dark skies. As magnification goes up, apparent brightness of the image goes down. Poor optical design can hack off the sides and you will see this clearly, if you can hold the actual binoculars in front of you. If shopping on the Internet, you'll have...
To determine the luminosities of the globular clusters, Shapely measured the periods of brightness of the RR Lyrae stars in the clusters. Once he knew the luminosities, he could calculate their distances from Earth. How Many Stars Are in the Milky Way? It's complicated, but you can use Newt...
You can use the changes in the light intensities to calculate the rate of the asteroid's rotation. Comets and Meteors Comet Kohoutek Photo courtesy of NASA A comet or a meteor streaking across the sky is an exciting sight for anyone, and a telescope can make these objects even more ...
switch eyes, so that your left is closed and your right is open. Your thumb will appear to shift slightly against the background. By measuring this small change and knowing the distance between your eyes, you can calculate the distance to your thumb....
Estimating distancesin astronomy is challenging. Think of how hard it is to estimate the distance of someone pointing a flashlight at you on a dark night. Galaxies come in a very wide range of sizes and masses. Measuring a galaxy’s brightness or apparent size isnot a good guideto its dis...
If we know a star’s intrinsic brightness as well as its apparent brightness, we can use those values to easily calculate its distance. In the absence of other factors, all light sources appear dimmer with distance. A 30-watt bulb, for example, always shines with a brightness of 30 watts...
With the collected data, we used the formula below to calculate the Satisfaction Index score per picture, and we scaled the result so that it would fit within a range of 0 to 100. Taking into account the confidence interval for each portion of the index, we could also determine...
Calculate Resistance from Luminosity: To change the LED brightness is to control the voltage that go through the LED. Connecting a resistor with higher resistance will make the LED dimmer. To get an accurate combination of resistors, you can use aVoltage Divider Calculatorto help. ...
Intensity is a quantity that is normally used when referring to light or sound. In physics, intensity refers to a fraction with the power output of the source at the numerator and the surface area where the quantity propagates as the denominator. Answer and Explanation: The b...
Astronomers use Cepheid stars to measure distance. First, the period of a distant Cepheid is measured. The period is the length of time between brightness peaks. Next, they measure the peak luminosity of the star itself; this gives them the apparent brightness. Then, assuming that all Cepheid...