Chapter 18 – Refraction at Spherical Surfaces
Sahay Sir > Question Answers > Cengage NEET by C.P Singh > Part 2 > Chapter 18 - Refraction at Spherical Surfaces
Two convex lenses of focal length f1 and f2 are mounted coaxially separated by a distance. If the power of the combination is zero, the distance between the lenses is.
17
Nov
Two convex lenses of focal length f1 and f2 are mounted coaxially separated by a distance. If the power of the combination is zero, the distance between the lenses is. the distance between the lenses is. Two convex lenses of focal length f1 and f2 are mounted coaxially separated by a distance. If the power [...]
A convex lens A of focal length 20cm and a concave lens B 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 is equal to
17
Nov
A convex lens A of focal length 20cm and a concave lens B 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 is equal to A convex lens of [...]
A parallel beam of light incident on a concave lens of focal length 10 cm emerges as a parallel beam from a convex lens placed coaxially, the distance between the lenses being 10 cm. The focal length of the convex lens in cm is
17
Nov
A parallel beam of light incident on a concave lens of focal length 10 cm emerges as a parallel beam from a convex lens placed coaxially, the distance between the lenses being 10 cm. The focal length of the convex lens in cm is A parallel beam of light incident on a concave lens of [...]
The size of the image of an object, which is at infinity, as formed by a convex lens of focal length 30 cm is 2 cm. If a concave lens of focal length 20 cm is placed between the convex lens and the image at a distance of 26 cm from the convex lens, calculate the new size of the image
17
Nov
The size of the image of an object, which is at infinity, as formed by a convex lens of focal length 30 cm is 2 cm. If a concave lens of focal length 20 cm is placed between the convex lens and the image at a distance of 26 cm from the convex lens, calculate [...]
Consider the situation as shown. If u1 =1.5, u2 =1.2 and each radius of curvature is 14 cm, the image will be formed at distance
17
Nov
Consider the situation as shown. If u1 =1.5, u2 =1.2 and each radius of curvature is 14 cm, the image will be formed at distance Consider the situation as shown. If u1 =1.5 the image will be formed at distance u2 =1.2 and each radius of curvature is 14 cm November 17, 2020 Category: Cengage [...]
A concave lens and a convex lens have same focal length of 20cm and both put in contact this combination is used to view an object 5cm long kept at 20cm from the lens combination. As compared to object the image will be
17
Nov
A concave lens and a convex lens have same focal length of 20cm and both put in contact this combination is used to view an object 5cm long kept at 20cm from the lens combination. As compared to object the image will be A convex lens of glass has power P in air. If it [...]
A beam of parallel rays is brought to focus by a plano-convex lens. A thin concave lens of the same focal length is joined to the first lens. The effect of this is :
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Nov
A beam of parallel rays is brought to focus by a plano-convex lens. A thin concave lens of the same focal length is joined to the first lens. The effect of this is : A beam of parallel rays is brought to focus by a plano-convex lens. A thin concave lens of the same focal [...]
A real image is formed by a convex lens. If we put a concave lens in contact with it, the combination again forms a real image. The new image :
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Nov
A real image is formed by a convex lens. If we put a concave lens in contact with it, the combination again forms a real image. The new image : A real image is formed by a convex lens. If we put a concave lens in contact with it the combination again forms a real [...]
Two thin lenses of powers 2D and 3D are placed in contact. An object is placed at a distance of 30 cm from the combination The distance in cm of the image from the combination is
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Nov
Two thin lenses of powers 2D and 3D are placed in contact. An object is placed at a distance of 30 cm from the combination The distance in cm of the image from the combination is Two thin lenses of powers 2D and 3D are placed in contact. An object is placed at a distance [...]
A convex lens of focal length 40 cm a concave lens of focal length 40 and a concave lens of focal length 15 cm are placed in contact. The power of this combination of are placed in contact. The power of this combination in diopters is
17
Nov
A convex lens of focal length 40 cm a concave lens of focal length 40 and a concave lens of focal length 15 cm are placed in contact. The power of this combination of are placed in contact. The power of this combination in diopters is A convex lens of glass has power P in [...]