Chapter 26 – Geometrical Optics

A convex lens A of focal length 20cm and a concave lens G of focal length 5cm are kept along the same axis with the distance d between them. If a parallel beam of light falling on A leaves B as a parallel beam, then the distance d in cm will be The critical angle [...]

A convex lens of focal length 1.0m and a concave lens of focal length 0.25m are 0.75m apart. A parallel beam of light is incident on the convex lens. The beam emerging after refraction from both lenses is The critical angle for light going from medium X into medium Y is θ. The speed of [...]

A convex lens of power +6d is placed in contact with concave lens of power -4d. what will be the nature and focal length of the combination ? A convex lens of power +6d is placed in contact with concave lens of power -4d. what will be the nature and focal length of the combination [...]

An object 15cm high is placed 10cm from the optical center of a thin lens. Its image is formed 25cm from the optical center on the same side of the lens as the object. The height of the image is: An object 15cm high is placed 10cm from the optical center of a thin lens. [...]

The critical angle for light going from medium X into medium Y is θ. The speed of light in medium X is v. The speed of light in medium Y is The critical angle for light going from medium X into medium Y is θ. The speed of light in medium X is v. The [...]

A spherical mirror forms an image of magnification 3. The object distance, if focal length of mirror is 24cm, may be A spherical mirror forms an image of magnification 3. The object distance if focal length of mirror is 24cm may be November 15, 2020 Category: Cengage JEE Mains Physics by B.M Sharma , Chapter [...]

An equiconvex lens is cut into two halves along (i)XOX′ and (ii)YOY′ as shown in the figure. Let f, f′ f” be the focal lengths of the complete lens, of each half in case (i), and of each half in case (ii), respectively, Choose the correct statement from the following An equiconvex lens is cut [...]

Two convex lenses placed in contact form the image of a distant object at P. If the lens B is moved to the right, the image will the image will Two convex lenses placed in contact form the image of a distant object at P. If the lens B is moved to the right November [...]

A lens forms a virtual, diminished image of an object placed at 2m from it. The size of image is half of the object. Which one of the following statements is correct regarding the nature and focal length of the lens ? A lens forms a virtual diminished image of an object placed at 2m [...]

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 [...]