How many photons per second enter the eye from the star

Reference no: EM13695481

Question: The human eye can barely detect a star whose intensity at the earth's surface is 1.8 x 10^-11 W/m². If the dark adapted eye has a pupil diameter of 6.5 mm,

Part A: How many photons per second enter the eye from the star?

I need help to solve the above question and assume the starlight has a wavelength of 550 nm.

Reference no: EM13695481

Questions Cloud

What is its volume in cubic feet : A swimming pool id 20.00 m long, 7.00 m wide, and 2.00 m deep. What is its volume in cubic feet to 3 significant figures

Cost centers personnel budgets for the coming fiscal year : Personnel Budget Case Study Linda Watson has recently accepted a position as the assistant administrator for the department of nursing at St. Joseph Hospital. There have been both personnel and financial problems at St. Joseph Hospital, and r..

What is its average acceleration in this given interval : Starting from rest, a subway train first accelerates to 28m/s and then begins to brake. What is its average acceleration in this 48-s interval

What ways do the techniques appear to fail : Ms. Kathleen Boyd, director of logistics for the Scenic Calendar Company, wishes to evaluate two methods of time series forecasting. She has collected quarterly calendar sales data from the years 2003 and 2004. 2003 2004 Qtr. Actual Sales Qtr...

How many photons per second enter the eye from the star : The human eye can barely detect a star whose intensity at the earth's surface is 1.8 x 10-11 W/m2. How many photons per second enter the eye from the star

Find the balls original speed : A ball is thrown vertically upward on the moon and returns to its starting point in 4 sec. Acceleration on the moon is 1.6m/s2 downward. Find the balls original speed

What is the magnitude of the force on a calcium ion : Large electric fields in cell membranes cause ions to move through the cell wall, as we will explore in a later chapter. What is the magnitude of the force on a calcium ion with charge +e

With what initial velocity were the keys thrown : A student throws a set of keys vertically upward to her sorority sister, who is in a window 2.20 m above. With what initial velocity were the keys thrown

User Account

All Pages