Physics-

General

Easy

Question

# A bi-convex lens is formed with two thin planoconvex lenses as shown in the figure. Refractive index ‘n’ of the first lens is 1.5 and that of the second lens is 1.2. Both the curved surface are of the same radius of curvature R=14 cm. For this bi-convex lens, for an object distance of 40 cm, the image distance will be

- -280.0 cm
- 40.0 cm
- 21.5 cm
- 13.3 cm

## The correct answer is: 40.0 cm

### Related Questions to study

physics-

### The effective focal length of the lens combination shown in figure is - 60 cm. The radii of curvature of the curved surfaces of the plano-convex lenses are 12 cm each and refractive index of the material of the lens is 1.5. The refractive index of the liquid is

### The effective focal length of the lens combination shown in figure is - 60 cm. The radii of curvature of the curved surfaces of the plano-convex lenses are 12 cm each and refractive index of the material of the lens is 1.5. The refractive index of the liquid is

physics-General

physics-

### A transparent thin film of uniform thickness and refractive index is coated on the convex spherical surface of radius R at one end of a long solid glass cylinder of refractive index , as shown in figure. Rays of light parallel to the axis of the cylinder traversing through the film from air to glass get focused at distance f_{1} from the film, while rays of light traversing from glass to air get focused at distacnce f_{2} from the film. Then

### A transparent thin film of uniform thickness and refractive index is coated on the convex spherical surface of radius R at one end of a long solid glass cylinder of refractive index , as shown in figure. Rays of light parallel to the axis of the cylinder traversing through the film from air to glass get focused at distance f_{1} from the film, while rays of light traversing from glass to air get focused at distacnce f_{2} from the film. Then

physics-General

physics-

### A ray of light travelling in air is incident at a grazing angle on a large transparent slab of thickness . The point of incidence is the origin. The medium has a variable refractive index(y) given by Where y is in m and

a) Express a relation between the angle of incidence and the slope of the trajectory m, in terms of the refractive index at that point m ( y)</span

### A ray of light travelling in air is incident at a grazing angle on a large transparent slab of thickness . The point of incidence is the origin. The medium has a variable refractive index(y) given by Where y is in m and

a) Express a relation between the angle of incidence and the slope of the trajectory m, in terms of the refractive index at that point m ( y)</span

physics-General

physics-

### A ray of ligth enters into a glass slab from air as shown .If refractive of glass slab is given by where A and B are constants and ‘t’ is the thickness of slab measured from the top surface. Find the maximum depth travelled by ray in the slab. Assume thickness of slab to be sufficiently large

### A ray of ligth enters into a glass slab from air as shown .If refractive of glass slab is given by where A and B are constants and ‘t’ is the thickness of slab measured from the top surface. Find the maximum depth travelled by ray in the slab. Assume thickness of slab to be sufficiently large

physics-General

physics-

### The refraction index of an anisotropic medium varies as . A ray of light is incident at the origin just along y-axis (shown in figure). Find the equation of ray in the medium

### The refraction index of an anisotropic medium varies as . A ray of light is incident at the origin just along y-axis (shown in figure). Find the equation of ray in the medium

physics-General

physics-

### Due to a vertical temperature gradient in the atmosphere, the index of refraction varies. Suppose index of refraction varies as , where n_{0} is the index of refraction at the surface and . A person of height h = 2.0 m stands on a level surface. Beyond what distance will he not see the runway?

### Due to a vertical temperature gradient in the atmosphere, the index of refraction varies. Suppose index of refraction varies as , where n_{0} is the index of refraction at the surface and . A person of height h = 2.0 m stands on a level surface. Beyond what distance will he not see the runway?

physics-General

physics-

### Find the variation of refractive index assuming it to be a function of y such that a ray entering origin at grazing incidence follows a parabolic path y = x^{2} as shown in fig

### Find the variation of refractive index assuming it to be a function of y such that a ray entering origin at grazing incidence follows a parabolic path y = x^{2} as shown in fig

physics-General

physics-

### A light ray travelling in a glass medium is incident on glass - air interface at an angle of incidence q . The reflected (R) and transmitted (T) intensities, both as function ofq , are plotted. The correct sketch is

### A light ray travelling in a glass medium is incident on glass - air interface at an angle of incidence q . The reflected (R) and transmitted (T) intensities, both as function ofq , are plotted. The correct sketch is

physics-General

physics-

### A cubic container is filled with a liquid whose refractive index increases linearly from top to bottom. Which of the following represents the path of a ray of light inside the liquid?

### A cubic container is filled with a liquid whose refractive index increases linearly from top to bottom. Which of the following represents the path of a ray of light inside the liquid?

physics-General

physics-

### A plane mirror is placed at the bottom of a tank containing a liquid of refractive index m . P is a small object at a height h above the mirror. An observer O, vertically above P, outside the liquid, observes P and its image in the mirror. The apparent distance between these two will be

### A plane mirror is placed at the bottom of a tank containing a liquid of refractive index m . P is a small object at a height h above the mirror. An observer O, vertically above P, outside the liquid, observes P and its image in the mirror. The apparent distance between these two will be

physics-General

physics-

### A ray of light travels in the way as shown in the figure. After passing through water, the ray grazes along the water air interface. The value of m_{g} interms of ‘i’ is

### A ray of light travels in the way as shown in the figure. After passing through water, the ray grazes along the water air interface. The value of m_{g} interms of ‘i’ is

physics-General

physics-

### A reflecting surface is represented by the equation . A ray travelling in negative x-direction is directed towards positive y-direction after reflection from the surface at point P. Then co-ordinates of point P are

### A reflecting surface is represented by the equation . A ray travelling in negative x-direction is directed towards positive y-direction after reflection from the surface at point P. Then co-ordinates of point P are

physics-General

Maths-

### If then principal values of ' ' are

### If then principal values of ' ' are

Maths-General

Maths-

### If and is in the first quadrant then =....

### If and is in the first quadrant then =....

Maths-General

Maths-

### If and lies in then =

### If and lies in then =

Maths-General