Physics M.C.Q (1 Marks)

The light when enters the human eye experiences most of the refraction while passing through

A presbyopic patient has near point as 30 cm and far point as 40 cm. The dioptric power for the corrective lens for seeing distant objects is

If the distance of the far point for a myopia patient is doubled, the focal length of the lens required to cure it will become

A man suffering from myopia can read a book placed at 10 cm distance. For reading the book at a distance of 60 cm with relaxed vision, focal length of the lens required will be

The far point of a myopia eye is at 40 cm. For removing this defect, the power of lens required will be

A man can see the object between 15 cm and 30 cm. He uses the lens to see the far objects. Then due to the lens used, the near point will be at

A man can see the objects upto a distance of one metre from his eyes. For correcting his eye sight so that he can see an object at infinity, he requires a lens whose power is

Image is formed for the short sighted person at

How should people wearing spectacles work with a microscope

If there had been one eye of the man, then

Image formed on the retina is

When light of wavelength λ is incident on an equilateral prism kept in its minimum deviation position, it is found that the angle of deviation equals the angle of the prism itself. The refractive index of the material of the prism for the wavelength λ is, then

Astigmatism (for a human eye) can be removed by using

Substance on the choroid is

For the myopic eye, the defect is cured by

For a normal eye, the least distance of distinct vision is

A far sighted man who has lost his spectacles, reads a book by looking through a small hole (3-4 mm) in a sheet of paper. The reason will be

If refractive index of red, violet and yellow lights are 1.42, 1.62 and 1.50 respectively for a medium. Its dispersive power will be

For a medium, refractive indices for violet, red and yellow are 1.62, 1.52 and 1.55 respectively, then dispersive power of medium will be

The path of a refracted ray of light in a prism is parallel to the base of the prism only when the

Line spectra are due to

Dark lines on solar spectrum are due to

A white screen illuminated by green and red light appears to be

The splitting of white light into several colours on passing through a glass prism is due to

A ray passes through a prism of angle 60° in minimum deviation position and suffers a deviation of 30°. What is the angle of incidence on the prism

A source emits light of wavelength 4700Å, 5400 Å and 6500 Å. The light passes through red glass before being tested by a spectrometer. Which wavelength is seen in the spectrum

Missing lines in a continuous spectrum reveal

White light is passed through a prism whose angle is 5°. If the refractive indices for rays of red and blue colour are respectively 1.64 and 1.66, the angle of deviation between the two colours will be

The wavelength of emission line spectrum and absorption line spectrum of a substance are related as

A man can see only between 75 cm and 200 cm. The power of lens to correct the near point will be

A man who cannot see clearly beyond 5 m wants to see stars clearly. He should use a lens of focal length

A triangular prism of glass is shown in the figure. A ray incident normally to one face is totally reflected, if θ = 45° . The index of refraction of glass is

A person cannot see distinctly at the distance less than one metre. Calculate the power of the lens that he should use to read a book at a distance of 25 cm

The refractive index of flint glass for blue F line is 1.6333 and red C line is 1.6161. If the refractive index for yellow D line is 1.622, the dispersive power of the glass is

A neon sign does not produce

Which of the following diagrams, shows correctly the dispersion of white light by a prism
 

A light ray is incident upon a prism in minimum deviation position and suffers a deviation of 34°. If the shaded half of the prism is knocked off, the ray will

A prism ABC of angle 30° has its face AC silvered. A ray of light incident at an angle of 45° at the face AB retraces its path after refraction at face AB and reflection at face AC. The refractive index of the material of the prism is

Lens used to remove long sightedness (hypermetropia) is

What will be the colour of sky as seen from the earth, if there were no atmosphere

The true statement is

A ray of light passes through an equilateral glass prism in such a manner that the angle of incidence is equal to the angle of emergence and each of these angles is equal to 3/4 of the angle of the prism. The angle of deviation is

Dispersion can take place for

The figures represent three cases of a ray passing through a prism of angle A. The case corresponding to minimum deviation is

A ray of light is incident at an angle of 60° on one face of a prism of angle 30°. The ray emerging out of the prism makes an angle of 30° with the incident ray. The emergent ray is

A medium is said to be dispersive, if

Fraunhofer lines are produced by