Consider a point at focal point of a convergent lens. Another convergent lens of short focal length

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10.Wave Optics

medium

Consider a point at the focal point of a convergent lens. Another convergent lens of short focal length is placed on the other side. What is the nature of the wavefronts emerging from the final image ?

Option A

Option B

Option C

Option D

Solution

Here final image is point like which is formed at position I on the common axis of both the lenses. As this point lies on wavefront, it behaves like self independent secondary source and emits secondary spherical waves in all the directions. At a given instant of time, if we think of a surface, circumscribing to secondary spherical waves (i.e. a surface tangential from outside) then it gives us shape and position of new wavefront at that time. In the present case its shape is found to be spherical.

Standard 12

Physics

In the adjoining diagram, a wavefront $AB$, moving in air is incident on a plane glass surface $XY$. Its position $CD$ after refraction through a glass slab is shown also along with the normals drawn at $A$ and $D$. The refractive index of glass with respect to air ($\mu = 1$) will be equal to

hard

The figure shows a surface $XY$ separating two transparent media, medium – $1$ and medium- $2$. The lines $ab$ and $cd$ represent wavefronts of a light wave traveling in medium- $1$ and incident on $XY$. The lines $ef$ and $gh$ represent wavefronts of the light wave in medium- $2$ after refraction.

The phases of the light wave at $c, d, e$ and $f$ are $\phi_c,\phi_d, \phi_e$ and $\phi_f$ respectively. It is given that $\phi_c \neq \phi_f.$

medium

Consider a point at the focal point of a convergent lens. Another convergent lens of short focal length is placed on the other side. What is the nature of the wavefronts emerging from the final image ?

Solution

Similar Questions

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Consider a point at the focal point of a convergent lens. Another convergent lens of short focal length is placed on the other side. What is the nature of the wavefronts emerging from the final image ?

Solution

Similar Questions

In the adjoining diagram, a wavefront $AB$, moving in air is incident on a plane glass surface $XY$. Its position $CD$ after refraction through a glass slab is shown also along with the normals drawn at $A$ and $D$. The refractive index of glass with respect to air ($\mu = 1$) will be equal to

What is the shape of the wavefront on earth for sunlight?

Huygen's theory of secondary waves can be used of find

Explain the reflection of plane wavefront from concave mirror.

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