The red laser beam operating at a wavelength lambda

Affiliates: 0,02 $how to earn
Pay with:
i agree with "Terms for Customers"
Sold: 3
Refunds: 0

Uploaded: 02.03.2014
Content: 50170.jpg (96,95 kB)
Loyalty discount! If the total amount of your purchases from the seller Юрий Физик more than:
5 $the discount is30%
1 $the discount is10%
If you want to know your discount rate, please provide your email:


The red laser beam operating at a wavelength lambda = 630 nm. It has the form of a cone with an angle of divergence of 10 ^ -4 rad. The radiated laser power Po = ZmVt. At what maximum distance L observer can see the laser light when the eye reliably detects 100 photons per second. Pupil diameter d = 0,5 cm. The absorption of light is not taken into account. The beam diameter at the laser output is much less than d.

Additional information

Task 50170 Detailed solution shorthand terms, formulas, laws used in the decision, the withdrawal of the calculation formula and the response.
If you have any questions to address, please. I'll try to help.


No feedback yet.
1 month 3 months 12 months
0 0 0
0 0 0
In order to counter copyright infringement and property rights, we ask you to immediately inform us at the fact of such violations and to provide us with reliable information confirming your copyrights or rights of ownership. Email must contain your contact information (name, phone number, etc.)