- [Hard]An astronomer wants a telescope to distinguish two closely spaced stars more clearly, and a student proposes ways to improve its resolving power....
- [Medium]A patient can see distant objects clearly but struggles to focus on nearby print, and an optometrist wants the correct classification and remedy....
- [Easy]A ray of light passes through a rectangular glass slab with parallel faces immersed in air, and a student describes how the emergent ray relates to th...
- [Easy]An astronomical telescope in normal adjustment uses an objective of focal length 100 cm and an eyepiece of focal length 5 cm to view distant stars....
- [Medium]A thin converging lens forms a sharp image on a screen placed 40 cm away when a candle stands 40 cm on the other side of the lens....
- [Easy]Two thin lenses of powers +5 D and -2 D are placed in contact along the same axis, and an optician wants the power of the combination....
- [Hard]A biconvex lens is ground from glass of refractive index 1.5 with both surfaces having a radius of magnitude 20 cm, so what is its focal length in air...
- [Easy]An illuminated object 2 cm tall is placed before a convex lens that produces a real image 6 cm tall on a screen, so what is the magnification?...
- [Medium]A thin glass prism of refractive index 1.5 has a refracting angle of 6 degrees, and a physics student wants the angle of minimum deviation it produces...
- [Easy]During the daytime the clear sky overhead appears blue to observers on the ground, and a curious learner wants to know the reason behind this colour....
- [Medium]A compound microscope achieves high magnification by combining two convex lenses, and a laboratory student wants to know how its total magnification i...
- [Medium]In a Young's double slit setup, light of wavelength 600 nm illuminates slits separated by 1 mm and the screen sits 2 m away....
- [Medium]Two independent ordinary light bulbs placed side by side never produce a stable interference pattern on a nearby wall, and a student wonders what is m...
- [Hard]Monochromatic light of wavelength 500 nm passes through a single slit of width 0.1 mm, so what is the angular position of the first diffraction minimu...
- [Hard]Unpolarized light of intensity I0 passes first through an ideal polarizer and then a second polarizer whose axis is tilted at 60 degrees to the first....
- [Medium]Light inside a diamond of refractive index 2.42 tries to escape into air, and a gemologist needs the critical angle beyond which total internal reflec...
- [Easy]Optical fibres carry telephone signals over long distances by trapping light within a thin glass core, and a student asks which principle keeps the li...
- [Medium]A ray of light travelling in air strikes the flat surface of a glass block of refractive index 1.5 at an angle of incidence of 30 degrees....
- [Easy]A convex mirror mounted on a delivery van has a radius of curvature of 3.0 m, so what is its focal length as felt by rays parallel to the axis?...
- [Medium]Snell's law for refraction is n1 sinθ1 = n2 sinθ2. It arises from conservation of?...
- [Easy]Law of reflection states angle of incidence equals?...
- [Easy]Critical angle c for medium (n) to air (n≈1) satisfies?...
- [Medium]Thin lens formula relates object distance u, image distance v, focal length f as?...
- [Easy]Linear magnification m of lens equals?...
- [Easy]Power P of lens (f in meters) equals?...
- [Medium]Constructive interference occurs for path difference?...
- [Hard]Condition for first minimum (m=1) in single slit diffraction (slit width a)?...
- [Medium]Polarization of light refers to?...
- [Easy]Concave mirror formula (paraxial) is?...
- [Easy]Optical fibers work mainly on?...
- [Hard]At minimum deviation, the prism condition entails?...
- [Medium]Equivalent power of two thin lenses in contact P1 and P2?...
- [Medium]Dispersion refers to separation of white light into colors due to variation of?...
- [Hard]Resolving power of optical instrument improves when?...