Chapter 9 – Ray Optics

A convex lens of focal length 20cm and made of glass refractive index 1.5 is immersed in water of μ=1.33. The change in focal length of the lens. A convex lens of focal length 20cm and made of glass refractive index 1.5 is immersed in water of μ=1.33. The change in focal length of the [...]

A double convex thin lens made of glass (refractive index, =1.5) has both radii of curvature of magnitude 20 cm. Incident light rays parallel to the axis of the lens will converge at a distance d in cm, such that : =1.5) has both radii of curvature of magnitude 20 cm. Incident light rays parallel [...]

A transparent sphere of radius R and refractive index μ is kept in the air. At what distance from the surface of the sphere should a point be placed so as to form a real image at the same distance from the other side of the sphere? If the behavior of light rays is shown [...]

A point object is placed at the center of a glass sphere of radius 6 cm and refractive index 1.5. The distance of virtual image from the surface is : A point object is placed at the center of a glass sphere of radius 6 cm and refractive index 1.5. The distance of virtual image [...]

The focal length of the lens of refractive index ( μ = 1.5 )in air is 10cm. If air is replaced by water of (μ=4/3) its focal length is The focal length of the lens of refractive index ( μ = 1.5 )in air is 10cm. If air is replaced by water of (μ=4/3) its [...]

What is the refractive index of material of a planoconvex lens, if the radius of curvature of the convex surface is 10 cm and focal length of the lens is 30 cm ? if the radius of curvature of the convex surface is 10 cm and focal length of the lens is 30 cm ? [...]

If the behavior of light rays is shown in the figure. The relation between refractive indices u, u1 and u2 is If the behavior of light rays is shown in the figure. The relation between refractive indices u u1 and u2 is November 8, 2020 Category: Chapter 9 - Ray Optics , MTG NEET Physics [...]

An equiconvex lens of glass of focal length 0.1 m is cut along a plane perpendicular to principal axis into two equal parts. The ratio of focal length of new lens formed is An equiconvex lens of glass of focal length 0.1 m is cut along a plane perpendicular to principal axis into two equal [...]

A screen is placed 90 cm away from an object. The image of the object on the screen is formed by a convex lens at two different locations separated by 20 cm. Find the focal length of lens. A screen is placed 90 cm away from an object. The image of the object on the [...]

A concave lens forms the image of an object such that the distance between the object and image is 10 cm and the magnification produced is 1/4. The focal length of the lens will be A concave lens forms the image of an object such that the distance between the object and image is 10 [...]