Spherical Surface and Lenses, Lens Formula, Magnification, Combination of Lens.
Ray Optics

282449 The mirrors used as rear-view mirrors in vehicles are

1 concave
2 convex
3 cylindrical
4 plane
Ray Optics

282431 A half spherical glass lens with refractive index 1.5 is placed in a liquid with refractive index of 1.3 (see following figure). The radius of the half spherical lens is \(10 \mathrm{~cm}\). A parallel beam of light travelling in the liquid is refracted by the glass lens. Then the absolute value of the position of the image from the centre of the glass lens will be
![original image](https://cdn.mathpix.com/snip/images/PwsrF_FYuIJsZRG2EpjpfI3ooL7WTpjVohtKMXroPUM.original.fullsize.png)

1 \(10 \mathrm{~cm}\)
2 \(65 \mathrm{~cm}\)
3 \(5 \mathrm{~cm}\)
4 \(11.5 \mathrm{~cm}\)
Ray Optics

282432 A light beam of wavelength \(800 \mathrm{~nm}\) passes through a single slit and projected on a screen kept at \(5 \mathrm{~m}\) away from the slit. What should be the slit width for the ray optics approximation to be valid

1 \(0.5 \mathrm{~mm}\)
2 \(2 \mathrm{~mm}\)
3 \(1.5 \mathrm{~mm}\)
4 \(0.25 \mathrm{~mm}\)
Ray Optics

282433 Two convex lenses with power 2 dioptre are kept in contact with each other. The focal length of the combined lens system is

1 \(0.10 \mathrm{~m}\)
2 \(2 \mathrm{~m}\)
3 \(4 \mathrm{~m}\)
4 \(0.25 \mathrm{~m}\)
Ray Optics

282449 The mirrors used as rear-view mirrors in vehicles are

1 concave
2 convex
3 cylindrical
4 plane
Ray Optics

282431 A half spherical glass lens with refractive index 1.5 is placed in a liquid with refractive index of 1.3 (see following figure). The radius of the half spherical lens is \(10 \mathrm{~cm}\). A parallel beam of light travelling in the liquid is refracted by the glass lens. Then the absolute value of the position of the image from the centre of the glass lens will be
![original image](https://cdn.mathpix.com/snip/images/PwsrF_FYuIJsZRG2EpjpfI3ooL7WTpjVohtKMXroPUM.original.fullsize.png)

1 \(10 \mathrm{~cm}\)
2 \(65 \mathrm{~cm}\)
3 \(5 \mathrm{~cm}\)
4 \(11.5 \mathrm{~cm}\)
Ray Optics

282432 A light beam of wavelength \(800 \mathrm{~nm}\) passes through a single slit and projected on a screen kept at \(5 \mathrm{~m}\) away from the slit. What should be the slit width for the ray optics approximation to be valid

1 \(0.5 \mathrm{~mm}\)
2 \(2 \mathrm{~mm}\)
3 \(1.5 \mathrm{~mm}\)
4 \(0.25 \mathrm{~mm}\)
Ray Optics

282433 Two convex lenses with power 2 dioptre are kept in contact with each other. The focal length of the combined lens system is

1 \(0.10 \mathrm{~m}\)
2 \(2 \mathrm{~m}\)
3 \(4 \mathrm{~m}\)
4 \(0.25 \mathrm{~m}\)
Ray Optics

282449 The mirrors used as rear-view mirrors in vehicles are

1 concave
2 convex
3 cylindrical
4 plane
Ray Optics

282431 A half spherical glass lens with refractive index 1.5 is placed in a liquid with refractive index of 1.3 (see following figure). The radius of the half spherical lens is \(10 \mathrm{~cm}\). A parallel beam of light travelling in the liquid is refracted by the glass lens. Then the absolute value of the position of the image from the centre of the glass lens will be
![original image](https://cdn.mathpix.com/snip/images/PwsrF_FYuIJsZRG2EpjpfI3ooL7WTpjVohtKMXroPUM.original.fullsize.png)

1 \(10 \mathrm{~cm}\)
2 \(65 \mathrm{~cm}\)
3 \(5 \mathrm{~cm}\)
4 \(11.5 \mathrm{~cm}\)
Ray Optics

282432 A light beam of wavelength \(800 \mathrm{~nm}\) passes through a single slit and projected on a screen kept at \(5 \mathrm{~m}\) away from the slit. What should be the slit width for the ray optics approximation to be valid

1 \(0.5 \mathrm{~mm}\)
2 \(2 \mathrm{~mm}\)
3 \(1.5 \mathrm{~mm}\)
4 \(0.25 \mathrm{~mm}\)
Ray Optics

282433 Two convex lenses with power 2 dioptre are kept in contact with each other. The focal length of the combined lens system is

1 \(0.10 \mathrm{~m}\)
2 \(2 \mathrm{~m}\)
3 \(4 \mathrm{~m}\)
4 \(0.25 \mathrm{~m}\)
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Ray Optics

282449 The mirrors used as rear-view mirrors in vehicles are

1 concave
2 convex
3 cylindrical
4 plane
Ray Optics

282431 A half spherical glass lens with refractive index 1.5 is placed in a liquid with refractive index of 1.3 (see following figure). The radius of the half spherical lens is \(10 \mathrm{~cm}\). A parallel beam of light travelling in the liquid is refracted by the glass lens. Then the absolute value of the position of the image from the centre of the glass lens will be
![original image](https://cdn.mathpix.com/snip/images/PwsrF_FYuIJsZRG2EpjpfI3ooL7WTpjVohtKMXroPUM.original.fullsize.png)

1 \(10 \mathrm{~cm}\)
2 \(65 \mathrm{~cm}\)
3 \(5 \mathrm{~cm}\)
4 \(11.5 \mathrm{~cm}\)
Ray Optics

282432 A light beam of wavelength \(800 \mathrm{~nm}\) passes through a single slit and projected on a screen kept at \(5 \mathrm{~m}\) away from the slit. What should be the slit width for the ray optics approximation to be valid

1 \(0.5 \mathrm{~mm}\)
2 \(2 \mathrm{~mm}\)
3 \(1.5 \mathrm{~mm}\)
4 \(0.25 \mathrm{~mm}\)
Ray Optics

282433 Two convex lenses with power 2 dioptre are kept in contact with each other. The focal length of the combined lens system is

1 \(0.10 \mathrm{~m}\)
2 \(2 \mathrm{~m}\)
3 \(4 \mathrm{~m}\)
4 \(0.25 \mathrm{~m}\)