Light with an energy flux of 20 W/cm^2 falls on a non-reflecting surface at normal incidence.

Monjur Alahi

Light with an energy flux of 20 W/cm2 falls on a non-reflecting surface at normal incidence. If the surface has an area of 30 cm2. the total momentum delivered (for complete absorption) during 30 minutes is

(a) 36 × 10–5 kg m/s.

(b) 36 × 10–4 kg m/s.

(c) 108 × 104 kg m/s.

(d) 1.08 × 107 kg m/s.


0 like 0 dislike
1 views
Share with your friends

1 Answers

Salim Ahmed Kawsar

Call

(b) 36 × 10–4 kg m/s.

0 like 0 dislike
1 views
Talk Doctor Online in Bissoy App
What is Perfectly Elastic Supply? When price falls by Rs.2 per unit, supply falls from 100 units to 80 units.

Es = P/Q x ΔQ/ΔP = P/100 x -20/-2 = 400/20 = Rs. 20

1 Answers 1 views
Ozone layer in the outer atmosphere helps in: I. Reflecting radio waves and makes radio communication possible

The Right option is : (b) Only II

1 Answers 1 views
We can see a non-luminous object when light: (a) emitted by the object falls on the eye.

(b) is reflected from the object towards our eye. 

1 Answers 1 views
A linearly polarized electromagnetic wave given as E=Eoicos(kz-ωt) is incident normally on a perfectly reflecting infinite wall at z = a.

(b) Er= Eoi cos(kz+ωt).

1 Answers 1 views
A short pulse of white light is incident from air to a glass slab at normal incidence. After travelling through the slab,

the first colour to emerge is red.

1 Answers 1 views
When an electron falls from a higher energy to a lower energy level, the difference in the energies appears in the form of electromagnetic radiation.

Because electrons interact only electromagnetically.

1 Answers 1 views
Why does a child feel more pain when she falls down on a hard cement floor, than when she falls on the soft muddy ground in the garden?

The body of the child is brought to a sudden halt when she/he falls on a cement floor. The mud floor yields and the body travels some distance before it...

1 Answers 1 views
Reflecting on the story, what did you feel about Evans’ having the last laugh?

Evans smartly devised and executed the plan of his escape. He managed to fool everyone till the end of the story. He left fake clues to misguide the officials chasing...

1 Answers 1 views
Fill in the following blank with a suitable word : When light is reflected, the angles of incidence and reflection are…………

When light is reflected, the angles of incidence and reflection are Equal.

1 Answers 1 views
What is the difference between regular reflection of light and diffuse reflection of light ? What type of reflection of light takes place from

In regular reflection, a parallel beam of incident light is reflected as a parallel beam in one direction; while in diffuse reflection, a parallel beam of incident light is reflected...

1 Answers 1 views
X