+91-705-589-3577
FlagBACK
Flag Wave Optics> A photographic plate records sufficiently...
question mark

A photographic plate records sufficiently intense lines when it is exposed for 12 s to a source of 10 W. How long should it be exposed to a 12 W source radiating the light of same colour to get equally intense lines?

Amit Saxena , 11 Years ago
Grade upto college level
anser 1 Answers
Deepak Patra
Sol. To get equally intense lines on the photographic plate, the radiant flux (energy) should be same. S0, 10W × 12sec = 12W × t ⇒ t = 10W * 12 sec/12W = 10 sec.
Last Activity: 11 Years ago
star
LIVE ONLINE CLASSES

Prepraring for the competition made easy just by live online class.

tv

Full Live Access

material

Study Material

removal

Live Doubts Solving

assignment

Daily Class Assignments


Other Related Questions on wave optics

question mark

what is meant by refractive index?

wave optics
1 Answer Available

Last Activity: 5 Months ago

question mark
An oscillator consists of a block of mass 512 g connected to a spring. When set into oscillation with amplitude 34.7 cm, it is observed to repeat its motion every 0.484 s. Find (a) the period, (b) the frequency, (c) the angular frequency, (d) the force constant, (e) the maximum speed, and ( f ) the maximum force exerted on the block.
wave optics
1 Answer Available

Last Activity: 3 Years ago

question mark
A PLANE TRANSMISSION GRATING HAS 45000 LINES. DETERMINE ITS RESOLVING POWER IN THE SECOND ORDER FOR WAVELENGTH OF 5000A.
 
wave optics
1 Answer Available

Last Activity: 4 Years ago

question mark
A PLANE TRANSMISSION GRATING HAS 45000 LINES. DETERMINE ITS RESOLVING POWER IN THE SECOND ORDER FOR WAVELENGTH OF 5000A.
wave optics
1 Answer Available

Last Activity: 4 Years ago

question mark
If V-numer of a multi mode fiber is 3. Calculate the no.of modes if it is step index and graded index fiber multimode fiber (rounded off)?
wave optics
1 Answer Available

Last Activity: 4 Years ago