Advertisements
Advertisements
प्रश्न
Obtain the equation for lateral magnification for thin lens.
Advertisements
उत्तर
Lateral magnification in thin lens
- OO’ be an object
- II’ be the inverted real image.
- Lateral Magnificient is defined as the ratio of height of the image to that of object.
- m = `"II'"/("OO'")`
`"II'"/("OO'") = "PI"/"PO"`
`- "h"_2/"h"_1 = - "v"/"u"`
m = `(- "h"_2)/"h"_1 = - "v"/"u"`
m = `"h"_2/"h"_1 = "v"/"u"`
m is negative for real image, Positive for virtual image.
Concave lens, m is always positive and less than one.
m for combining lenses,
m = `"h"_2/"h"_1 = "f"/("f + u") = ("f - v")/"f"`
APPEARS IN
संबंधित प्रश्न
The radius of curvature of curved surface at a thin planoconvex lens is 10 cm and the refractive index is 1.5. If the plane surface is silvered, then the focal length will be.
What are primary focus and secondary focus of convex lens?
What are the sign conventions followed for lenses?
Arrive at lens equation from lens maker’s formula.
What is power of a lens?
Derive the equation for effective focal length for lenses in contact.
Derive the equation for thin lens and obtain its magnification.
Derive the equation for effective focal length for lenses in out of contact.
A thin converging glass lens made of glass with refractive index 1.5 has a power of + 5.0 D. When this lens is immersed in a liquid of refractive index n, it acts as a divergent lens of focal length 100 cm. What must be the value of n?
A point object is placed at 20 cm from a thin plano-convex lens of focal length 15 cm whose plane surface is silvered. Locate the position and nature of the final image.
