NEET Physics Ray Optics Class 12 Questions
247 questions
Time taken by sunlight to pass through a window of thickness 4 mm whose refractive index is 3/2 is
The energy of a photon of light of wavelength 450 nₘ is
When light propagates through a material When light propagate permittivity εᵣ and relative medium of relative the velocity of light, v is given permeability μᵣ, the light in vacuum) by: (c = velocity of light in vacuum)
A point object is kept 60 cm in front of a spherical convex surface (μ = 1.5, radius of curvature 40 cm). The image formed is
The critical angle for a ray of light passing from glass to water is minimum for
The critical angle of a certain medium is sin⁻¹(3/5). The polarizing angle of the medium is
A beam of light travels from air into a medium. Its speed and wavelength in the medium are 1.5 × 10⁸ ms⁻¹ and 230 nₘ respectively. The wavelength of light in air will be.
A vessel of depth 'd' is half filled with oil of refractive index n₁ and the other half is filled with water of refractive index n₂. The apparent depth of this vessel when viewed from above will be-
An equiconvex lens is cut into two halves along (i) XOX and (ii) YOY as shown in the figure. Let f, f', f'' be the focal lengths of the complete lens, of each half in case (i), and of each half in case (ii) respectively. Choose the correct statement from the following:
The direction of ray of light incident on a concave mirror is shown by PQ while directions in which the ray would travel after reflection is shown by four rays marked 1, 2, 3 and 4 (figure). Which of the four rays correctly shows the direction of reflected ray?
Light travels in two media M₁ and M₂ with speeds 1.5 × 10⁸ m s⁻¹ and 2.0 × 10⁸ m s⁻¹ respectively. The critical angle between them is:
A convex lens of focal length 80 cm and a concave lens of focal length 50 cm are combined together. What will be their resulting power?
Light of two different frequencies whose photons has energies 1 eV and 2.5 eV respectively, successively illuminates a metal of work function 0.5 eV. The ratio of maximum kinetic energy of the emitted electron will be
Assertion (A): In Young’s double slit experiment all fringes are of equal width.
Reason (R): The fringe width depends upon wavelength of light (λ) used, distance of screen from plane of slits (D) and slits separation (d).
A biconvex lens has a radius of curvature of magnitude 20 cm. Which one of the following options best describe the image formed of an object of height 2 cm placed 30 cm from the lens?
Which colour of white light travels slowest, in glass
A convex lens has power P. It is cut into two halves along its principal axis. Further one piece (out of the two halves) is cut into two halves perpendicular to the principal axis (as shown in figure). Choose the incorrect option for the reported pieces.
A monochromatic light of frequency is produced by a LASER, emits the power of . Find how many number of photons are emitted per second.
A monochromatic light wave with wavelength λ₁ and frequency ν₁ in air enters another medium. If the angle of incidence and angle of refraction at the interface are 45° and 30° respectively, then the wavelength λ₂ and frequency ν₂ of the refracted wave are:
A microscope is focussed on a mark on a piece of paper and then a slab of glass of thickness 3 cm, and refractive index 1.5 is placed over the mark. How should the microscope be moved to get the mark in focus again?
You are given four sources of light each one providing a light of a single colour- red, blue, green and yellow. Suppose the angle of refraction for a beam of yellow light corresponding to a particular angle of incidence at the interface of two media is 90°. Which of the following statements is correct if the source of yellow light is replaced with that of other lights without changing the angle of incidence?
A compound microscope with an objective of 1 cm and eyepiece of 2.0 cm focal length has a tube length of 20 cm. Calculate the magnifying power of microscope is final image is formed at the near point of eye.
A ray of light is incident on a prism ABC in which ∠A = 60° as shown in the figure. The ray will:
For a glass prism (μ = 3) the angle of minimum deviation is equal to the angle of the prism. Find the angle of the prism in degree
Assertion: A Thick lens produces a coloured image of an object illuminated by white light. Reason: The refractive index of the material of lens is different for different wavelengths of light.
A short pulse of white light is incident from air to a glass slab at normal incidence. After travelling through the slab, the first colour to emerge is
The magnifying power of a compound microscope increases with when
Image formed in compound microscope is
A single slit of width a is illuminated by a monochromatic light of wavelength 600 nₘ. The value of 'a' for which first minimum appears at θ = 30° on the screen will be :
Two positions of convex lens for which image of the object is formed on the same screen are 40 cm and 80 cm from the object. The focal length of the lens is
Given below are two statements :
Statement I: When the white light passed through a prism, the red light bends lesser than yellow and violet.
Statement II: The refractive indices are different for different wavelengths in dispersive medium.
In the light of the above statements, choose the correct answer from the options given below :
The figure shows two converging lenses. The light rays are incident parallel to principal axis on first lens as shown. The distance between the lenses so that the emergent rays are also parallel to principal axis is
Question
What is the result of a parallel beam of light incident on a concave mirror?
What is the formula for linear magnification (m) in terms of the height of the image (h') and the height of the object (h)?
What phenomenon occurs when a beam of light strikes the water surface at a specific angle, resulting in it being completely reflected back into the water?
What phenomenon allows optical fibres to transmit light effectively?
What happens to the refracted ray when it passes from a denser medium to a rarer medium?
What happens to the rays of light after passing through the first lens in a system of lenses?
What is the closest comfortable viewing distance for an image formed by a simple microscope?
What is the critical angle of incidence for a ray transitioning from a denser medium to a rarer medium in diamond?
What happens to the image formed by a lens when the object is located closer than the focal length of the lens?
What happens to the reflected rays when a parallel beam of light is incident on a concave mirror?
Which of the following statements about image formation and light behavior is correct?
Which of the following combinations about refraction and optical density is correct?
Which of the following combinations about the behavior of light in different media is correct?
Which of the following combinations correctly describe the relationship between focal length, magnification, and lens type in optical instruments?
Which of the following statements about mirrors and lenses is correct?
Assertion (A): When a parallel beam of light is incident on a concave mirror, the reflected rays converge at a point on the principal axis.
Reason (R): The reflected rays in a concave mirror are paraxial and incident at points close to the pole.
Assertion (A): The focal length of a convex lens in contact with a concave lens can result in a diverging lens system.
Reason (R): The focal lengths of lenses in contact add algebraically.
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