MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
| 1. |
A parallel beam of light of wavelength 600 nm and intensity \[100\text{ }w\text{ }{{m}^{-2}}\]. How many photons cross \[1\text{ }c{{m}^{2}}\] area perpendicular to the beam in 1 sec? |
| A. | \[3.0\times {{10}^{16}}\] |
| B. | \[4.0\times {{10}^{15}}\] |
| C. | \[2.0\times {{10}^{14}}\] |
| D. | \[1.0\times {{10}^{13}}\] |
| Answer» B. \[4.0\times {{10}^{15}}\] | |