+91-705-589-3577
FlagBACK
Flag Wave Optics> a person with normal near point 25 cm usi...
question mark

a person with normal near point 25 cm using a compound microscope with objective of focal length 8 mm and an eye piece of focal length 2.5 cm can bring an object placed at 9 mm from the objective in sharp focus.the separation between two lenses and magnification respectively are
1]9.47cm,96
2]3.36cm,44
3]6cm,22
4]7.49cm,11

mgayathri , 9 Years ago
Grade 8
anser 1 Answers
Raveesh
For sharp focus, image should be formed at infinity.
For image to be at infinity, The image formed by the objective should be at the focus of the eyepiece.
WKT,
\frac{1}{f}                             
Magnification(m)= vo/uo(D/fe)
m=2.5/0.9(25/2.5)
m=2.5(10)/0.9
m=250/9
Last Activity: 9 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