There are two telescopes observing at night the first

Reference no: EM13584953

There are two telescopes observing at night. The first telescope is 0.3m and has a focal ratio of f/8. The second telescope has a focal ratio of f/4 and is 30m in diameter. They each have an identical CCD camera whose pixels are 25 microns on a side. How much energy will be accumulated in a single pixel in a 100s exposure?

Note: Object being observed has an apparent brightness of 1.0*10^-7 W m^-2 and has an angular diameter of 15 arcsecsonds.

I have determined that the focal ratios of telescope 1= 2.4m and telescope 2 = 120m, and the the energy incident on one pixel:=(1.0*10^-7) 2.5*10^-5)^2(100s)= 6.25*10^-10.

Reference no: EM13584953

Questions Cloud

Using your knowledge of statics discuss briefly why the : using your knowledge of statics discuss briefly why the magnitude and direction of the knee reaction force varies with

A pump on the ground floor of a building can pump up water : a pump on the ground floor of a building can pump up water to fill a tank of volume 30 m3 in 15 min. if the tank is 40m

Two stationary positive point charges charge 1 of magnitude : two stationary positive point charges charge 1 of magnitude 3.80nc and charge 2 of magnitude 1.70nc are separated by a

A -34 nc charge is on the x-axis at x1 -7 cm and a 42 nc : a -3.4 nc charge is on the x-axis at x1 -7 cm and a 4.2 nc charge is on the x-axis at x2 13cm.at what point or points

There are two telescopes observing at night the first : there are two telescopes observing at night. the first telescope is 0.3m and has a focal ratio of f8. the second

Consider an electron in an infinitely deep one-dimensional : consider an electron in an infinitely deep one-dimensional potential well of width lz 1 nm . thisnbspelectron is

A bullet with massnbspm521nbspg is moving horizontally with : a bullet with massnbspm5.21nbspg is moving horizontally with a speednbspv560nbspnbspmswhen it strikes a block of wood

You a building a circuit that requires a 150 pf capacitor : you a building a circuit that requires a 150 pf capacitor but you only have a drawer full of 100 pf capacitors.how can

An incident wave d20 cm sin 45x-18t where x and t are in : an incident wave d2.0 cm sin 4.5x-18t where x and t are in meters and seconds travels down a cord from a section with

User Account

All Pages