Questions
Light with an energy flux of falls on a perfectly reflecting surface at normal incidence. If the surface area is , the average force exerted on the surface is
Remember concepts with our Masterclasses.
80k UsersReady to Test Your Skills?
Check Your Performance Today with our Free Mock Tests used by Toppers!detailed solution
Correct option is B
Energy flux, I=25×104 W m-2 Area, A=15 cm2=15×10-4 m2 Speed of light, c=3×108 m s-1For a perfectly reflecting surface, the average force exerted on the surface isF=2IAc=2×25×104Wm-2×15×10-4 m23×108 m s-1 =250×10-8 N=2.50×10-6 NTalk to our academic expert!
Create Your Own Test
Your Topic, Your Difficulty, Your Pace
Similar Questions
A photon and an electron possess same de-Broglie wavelength. Given that c is speed of light and v, the speed of electrons, which of the following relations is correct ? Here = K.E. of electron, = K.E. of photon, = momentum of electron, = momentum of photon
799 666 8865
support@infinitylearn.com
6th Floor, NCC Building, Durgamma Cheruvu Road, Vittal Rao Nagar, HITEC City, Hyderabad, Telangana 500081.
free study material
JEE Mock Tests
JEE study guide
JEE Revision Notes
JEE Important Questions
JEE Sample Papers
JEE Previous Year's Papers
NEET previous year’s papers
NEET important questions
NEET sample papers
NEET revision notes
NEET study guide
NEET mock tests
