In terms of focal length, how far behind the camera lens is photosensitive surface located when very distant objects are being photographed?

Q: If light moves from medium A to medium B its velocity reduces by half, the ratio of refractive index…

A:

Q: Light travels through a material with an unknown index of refraction and an angle of incidence of 43…

A: If the refractive index for any medium is n, the wavelength of light is λo for vacuum or air then…

Q: A microscope objective lens has a diameter of 10 mm and a focal length of 3.0 mm. What is the…

A:

Q: What happens to a light wave when it hits a surface that has a lower index of refraction? a) It…

A: Given : What happens to the phase of reflected light when a light wave when it hits a surface that…

Q: Why do some objects only diffract around certain obstacles?

A: The phenomenon of diffraction is the bending of light around small (smaller than the wavelength of…

Q: Stars twinkle because:   A. the intensity of light emitted by them changes with time B. the distance…

A: When the light passes from one medium to another, the path of light is deviated, this phenomenon is…

Q: How can a clear object be transparent and visible at the same time?

A: When we put the pure water in a extra clear glass, it makes transparent system of glass and water.…

Q: Light hits a 30 cm thick piece of glass at an angle 60 degrees from the normal. It travels through…

A:

Q: A certain camera has f - numbers that range from 1.2 to 22. If the focal length of the lens is 55…

A: The minimum diameter is,

Q: Why is the lens on a good –quality camera coated with a thin film according to optics?

A: The thin film carries out multiple functions

Q: What is total internal refraction and what is meant by optical fibre?

A: Total internal refraction is "When light rays travel from a more optically dense medium to a less…

Q: The outer most layer of an optical fiber is called

A: Optical fiber's inner most layer is called core , next to it is called cladding , which help in…

Q: Assume that light of wavelength 6000Å is coming from a star. What is the limit of resolution of a…

A: It is given that,

Q: energy

A: Total internal reflection happens when angle of incidence go beyond the critical angle. It is the…

Q: The illumination intensity shall be decreased to one half. Only what is possible to change is…

A: Given: Illumination intensity decreased to half. Only change is in incident angle. Incident angle, ø…

Q: How is the refractive index of a medium related to the real and apparent depths of an object in that…

A: The apparent depth is the distance of virtual image from the surface of the water, and the real…

Q: How could a converging lens be made for sound waves?

A: These types of lens should be made from a non-solid material like gas, allowing things to be…

Q: Why is an object in water always appear to be at a depth shallower than it actually is?

A: When light ray falls on surface of varying medium, it produces phenomenon such as reflection and…

Q: Light of a frequency of 7.14x107Hz is incident on a plane mirror at an angle of 35°. Which equation…

A: In the question frequency of light is given and we know the speed of light , so we can calculate the…

Q: In the situation similar to that shown below, a small red LED (light-emitting diode) is placed on…

A:

Q: When light is incident on an interface between two materials, the angle of the refracted ray depends…

A: Change in wavelength of refracted light

Q: Which laser wavelengths are hazards for the following? a. cornea of the eye b. retina of the eye

A: Laser Wavelength: The visible (VIS) light spectrum ranges from violet to red, with wavelengths…

Q: What happens when coherent light shines on an object with an edge or aperture?

A: To determine: What will happen when the coherent light shines on an object with an edge or aperture?

Q: The principle behind optical fibers (a) Photo-electric effect (b) Tyndall effect (c) Total…

A: The optical fibre is a device which works on the principle of total internal reflection by which…

Q: The "increases in optical gain" can be achieved by O N1 > N2 O N1 < N2 N1 = N2

A: Explanation: N1 and N2 are the population in the ground state and excited state. Ratio of the…

Q: Under what conditions can light be modeled like a ray? Like a wave?

A: Light can be modeled as a ray when devices are much larger than the wavelength of light. In this…

Q: How might you determine the speed of light in a solid, rectangular, transparent object?

A: When a light ray enters a solid rectangular object, it will exit the other side, slightly displaced…

Q: How does the refractive index of a medium depend on its temperature?

A: The refractive index of the medium depends on its temperature.

Q: A Newton's ring apparatus is to be used to determine the radius of curvature of a lens (see the…

A: Radii of nth ring: rn = 0.122 cm = 1.22 x 10-3 m Radii of n+20 th ring: rn+20 = 0.268 cm = 2.68 x…

Q: An optical fibre is poked through a small aperture to make some observations. It is made of a core…

A:

Q: On what physical concept does optical fibers work?

A: Optical fiber works on concept of  " total          internal reflection of light" .…

Q: What happens to a light wave when it hits a surface that has a higher index of refraction? a) It…

A: Here given the light rays come and hits the surface with higher refractive index.We have to choose…

Q: Using focused laser light, an optical clamp can vertically balance a 2,000 um diameter polystyrene…

A:

Q: I am having trouble determining the final answer, as something is missing in how to convert the…

A:

Q: Lenses are coated with thin film to reduce_________. a. Diffraction b. Polarization c. Reflection…

A: Explanation-          Lenses are generally coated with the thin films of  Transparent material( i.e.…

Dispersion of White Light

Snell’s law is a formula that gives a relation between the angle of incidence and angle of refraction and is given as: