Optics — practice questions
55 curated practice questions from Optics (Physics NEET, NTA Exams) — 26 easy, 16 hard, 13 medium. Every question includes the final answer free; step-by-step worked solutions with a free account.
- The interference pattern is obtained with two coherent light sources of intensity ratio n. In the interference pattern…
- Two transparent media A and B are separated by a plane boundary. The speed of light in those media are 1.5 10^ 1 ~m / s…
- The index of refraction of diamond is 2.0, velocity of light in diamond in cm/s is approximately
- A mixture of light, consisting of wavelength 590 nm and an unknown wavelength, illuminates Young's double slit and…
- In a Young's double slit experiment, the separation between the slits is 0.15 mm. In the experiment, a source of light…
- The light beams of intensities in the ratio of 9 : 1 are allowed to interfere. What will be the ratio of the…
- A linearly polarised electromagnetic wave given as E = E 0 i cos( kz – ω t ) is incident normally on a perfectly…
- The fringe width for a source of light of wavelength 5000 a A in the Young's experiment is 0.5 mm. If the source is…
- The frequency of a light wave in a material is 2 × 10 14 Hz and wavelength is 5000 a A . The refractive index of…
- Given below are two statements: Statement I : In a movie, ordinarily 24 frames are projected per second from one end to…
- Light from a sodium lamp when passed through a 60^ prism has a minimum angle of deviation of 30^ . The index of…
- If light is completely polarized by reflection at a plane refracting surface, then the angle between the reflected and…
- Two point white dots are 1 mm apart on a black paper. They are viewed by eye of pupil diameter 3 mm. Approximately…
- Assertion : A portable AM radio set must be kept horizontal to receive the signals properly. Reason : Radio waves are…
- Two beams of light having intensities I and 4 I interfere to produce a fringe pattern on a screen. The phase difference…
- Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A)…
- The necessary condition for an interference by two sources of light is that
- What remains unchanged when an electromagnetic wave goes from air to glass ?
- To demonstrate the phenomenon of interference, two sources are required which emit radiations
- A thin glass (refractive index 1.5) lens has optical power of -5[] in air. Its optical power in liquid medium with…
- In an interference experiment, third bright fringe is obtained at a point on the screen with a light of 700 nm. What…
- Visible light of wavelength 6000 10^ -1 ~cm falls normally on a single slit and produces a diffraction pattern. It is…
- Two thin lenses of focal lengths f 1 and f 2 are in contact and coaxial. The power of the combination is
- Two thin lenses are of same focal length (A), but one is convex and the other one is concave. When they are placed in…
- Light of certain color has 2000 waves to the millimeter in air. What will be wavelength of this light in a medium of…
- The refractive index of glass is 1.520 for red light and 1.525 for blue light. Let D 1 and D 2 be angles of minimum…
- A biconvex lens has radii of curvature, 20 cm each. If the refractive index of the material of the lens is 1.5, the…
- Assertion : Television signals are received through sky-wave propagation. Reason : The ionosphere reflects…
- A ball is dropped from a height of 20 m above the surface of water in a lake. The refractive index of water is 4 3 . A…
- It is possible to distinguish between transverse and longitudinal waves by studying the property of
- A radar sends the waves towards a distant object and receives the signal reflected by object. These waves are :
- An eye specialist prescribes having combination of convex lens of focal length 40 cm in contact with a concave lens of…
- The angle of a prism is 60^ and its refractive index is 2 . The angle of minimum deviation suffered by a ray of light…
- The distance between an object and a divergent lens is m times the focal length of the lens. The linear magnification…
- Two lenses of power 6 D and — 2 D are combined to form a single lens. The focal length of this lens will be:
- The coherence of two light sources means that the light waves emitted have:
- Given below are two statements: Statement I : Thin film such as soap bubble or a thin layer of oil on water show…
- A single slit of width d is illuminated by violet light of wavelength 400 nm and the width of the diffraction pattern…
- A bird is flying in air at a height of X cm. It observes a fish vertically below it, at a depth of Y cm from the…
- A mixture of light, consisting of wavelength 590 nm and an unknown wavelength, illuminates Young's double slit and…
- In Young's double slit experiment the separation d between the slits is 2 mm, the wavelength of the light used is 5896…
- A beam of light composed of red and green rays is incident obliquely at a point on the face of rectangular glass slab…
- Radio wave diffract around building although light waves do not. The reason is that radio waves :
- Two thin lenses of focal length 20 cm and 25 cm are in contact. The effective power of the combination is
- A convex lens and a concave lens, each having same focal length of 25 cm, are put in contact to form a combination of…
- Which of the following is correct expression for velocity of light ?
- A beam of light of λ = 600 nm from a distant source falls on a single slit 1 mm wide and the resulting diffraction…
- Time taken by sunlight to pass through a window of thickness 4 mm, whose refractive index is 3 2 , is
- To get three images of a single object, one should have two plane mirrors at an angle of
- Two identical light waves, propagating in the same direction, have a phase difference δ. After they superpose the…
- The angle of minimum deviation for an incident light ray on an equilateral prism is equal to its refracting angle. The…
- A candle placed 25 cm from a lens, forms an image on a screen placed 75 cm on the other end of the lens. The focal…
- A narrow slit of width 1 mm is illuminated by monochromatic light of wavelength 600 nm. The distance between the first…
- Light travels a distance x in time t 1 in air and 10x in time t 2 in another denser medium. What is the critical angle…
- If the intensity ratio for two interfering coherent sources is II , then I_ max -I_ min I_ max +I_ min will be equal to