282337 A convex lens of focal length \(25 \mathrm{~cm}\) and made of glass with refractive index 1.5 is immersed in water. The absolute change in focal length of the glass is [Use refractive index of water \(=\frac{4}{3}\) ]

282338 Two convex lenses have focal lengths of \(50 \mathrm{~cm}\) and \(25 \mathrm{~cm}\), respectively. If these two lenses are placed in contact, then the net power of this combination will be equal to

282339 What is the focal length of a convex lens of focal length \(30 \mathrm{~cm}\) in contact with a concave lens of focal length \(10 \mathrm{~cm}\) ?

282340 A lens is made of glass having an index of refraction 1.5. One side of the lens is flat and the other side is convex with a radius \(R\). If an object is placed \(60 \mathrm{~cm}\), towards the convex side of the lens, the image is formed at \(120 \mathrm{~cm}\) on the other side of the lens. The value of \(R\) is

282337 A convex lens of focal length \(25 \mathrm{~cm}\) and made of glass with refractive index 1.5 is immersed in water. The absolute change in focal length of the glass is [Use refractive index of water \(=\frac{4}{3}\) ]

282338 Two convex lenses have focal lengths of \(50 \mathrm{~cm}\) and \(25 \mathrm{~cm}\), respectively. If these two lenses are placed in contact, then the net power of this combination will be equal to

282339 What is the focal length of a convex lens of focal length \(30 \mathrm{~cm}\) in contact with a concave lens of focal length \(10 \mathrm{~cm}\) ?

282340 A lens is made of glass having an index of refraction 1.5. One side of the lens is flat and the other side is convex with a radius \(R\). If an object is placed \(60 \mathrm{~cm}\), towards the convex side of the lens, the image is formed at \(120 \mathrm{~cm}\) on the other side of the lens. The value of \(R\) is

282337 A convex lens of focal length \(25 \mathrm{~cm}\) and made of glass with refractive index 1.5 is immersed in water. The absolute change in focal length of the glass is [Use refractive index of water \(=\frac{4}{3}\) ]

282338 Two convex lenses have focal lengths of \(50 \mathrm{~cm}\) and \(25 \mathrm{~cm}\), respectively. If these two lenses are placed in contact, then the net power of this combination will be equal to

282339 What is the focal length of a convex lens of focal length \(30 \mathrm{~cm}\) in contact with a concave lens of focal length \(10 \mathrm{~cm}\) ?

282340 A lens is made of glass having an index of refraction 1.5. One side of the lens is flat and the other side is convex with a radius \(R\). If an object is placed \(60 \mathrm{~cm}\), towards the convex side of the lens, the image is formed at \(120 \mathrm{~cm}\) on the other side of the lens. The value of \(R\) is

282337 A convex lens of focal length \(25 \mathrm{~cm}\) and made of glass with refractive index 1.5 is immersed in water. The absolute change in focal length of the glass is [Use refractive index of water \(=\frac{4}{3}\) ]

282338 Two convex lenses have focal lengths of \(50 \mathrm{~cm}\) and \(25 \mathrm{~cm}\), respectively. If these two lenses are placed in contact, then the net power of this combination will be equal to

282339 What is the focal length of a convex lens of focal length \(30 \mathrm{~cm}\) in contact with a concave lens of focal length \(10 \mathrm{~cm}\) ?

282340 A lens is made of glass having an index of refraction 1.5. One side of the lens is flat and the other side is convex with a radius \(R\). If an object is placed \(60 \mathrm{~cm}\), towards the convex side of the lens, the image is formed at \(120 \mathrm{~cm}\) on the other side of the lens. The value of \(R\) is