Home
Class 12
PHYSICS
Light with an energy flux 20 W//cm^2 fal...

Light with an energy flux` 20 W//cm^2` falls on a non-reflecting surface at normal incidence. If the surface has an area of `30 cm^2`. the total momentum delivered ( for complete absorption)during 30 minutes is

A

`36x 10^(5)` kg -m/s

B

`36x 10^(4)` kg m/s

C

`108 x 10^(4)` kg -m/s

D

`1.08 x 10^(7) ` kg -m/s

Text Solution

Verified by Experts

The correct Answer is:
B
`U= phi ` At
Momentum of the incident light = `(U)/(C )`
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC WAVES

    NARAYNA|Exercise EXERCISE -3 PREVIOUS YEAR QUESTIONS|30 Videos

  • ELECTROMAGNETIC INDUCTION

    NARAYNA|Exercise ASSERTION & REASON|6 Videos

  • ELECTROSTATIC POTENTIAL AND CAPACITANCE

    NARAYNA|Exercise ADDITIONAL PROBLEMS|14 Videos

Similar Questions

Explore conceptually related problems

Light with an energy flux of 18W//cm^(2) falls on a non-reflecting surface at normal incidence. The pressure exerted on the surface is

Light with an energy flux of 40W//cm^(2) falls on a non-reflecting surface at normal incidence. If the surface has an area of 20cm^(2) , find the average force exerted on the surface during a 30min time span.

Light with an enargy flux of 25xx10^(4) Wm^(-2) falls on a perfectly reflecting surface at normal incidence. If the surface area is 15 cm^(2) , the average force exerted on the surface is

Light with energy flux of 18W//cm^(2) falls on a non reflecting surface of area 20cm^(2) at normal incidence the momentum delivered in 30 minutes is

Light with an average flux of 20 W/cm^2 falls on a non-reflecting surface at normal incidence having surface area 20 cm^2 . The energy received by the surface during time span of 1 minute is:

Light with an energy flux of 18 W cm^(-2) falls on a non-reflecting surface at normal incidence. If the surface at normal incidence. If the surface has an area of 20 cm^(2) , find the average force exerted on the surface during a span of 30 min.

If the total electromagnetic energy falling on a surface is U then the total momentum delivered (for complate absorption) is