April 23, 2024
Which one of the following statements is not true for a person suffering from hypermetropia?
  • (A) The person can see far objects distinctly.
  • (B) The focal length of the lens is large.
  • (C) The image of the close object is focussed behind the retina.
  • (D) A concave lens is used to correct this defect.
The image which is formed behind the mirror
  • (A) Real image
  • (B) Virtual image
  • (C) Blue image
  • (D) Partial image
The formation of glittering colors in thin foam of soap is the result of which of the following phenomenon
  • (A) Total reflection and interference
  • (B) Total refraction and dispersion
  • (C) Diffraction and dispersion
  • (D) Polarization and interference
'Endoscope' used by the doctors for examining the inside of patient's stomach, works on the principle of-
  • (A) Reflection of light
  • (B) Dispersion of light
  • (C) Refraction of light
  • (D) Total internal reflection of light
Optical fiber works on the principle of :
  • (A) Total internal reflection
  • (B) Refraction
  • (C) Scattering
  • (D) Interference
Given below are two statements, one labeled as Assertion (A) and other labeled as Reason (R) :
. Assertion (A) : A diamond sparkles more than a glass imitation cut to the same shape.
Reason (R) : The refractive index of diamond is less than that of glass. In the context of the above two statements, which one of the following is correct?
  • (A) Both A and R are true and R is the correct explanation of A
  • (B) Both A and R are true but R is not a correct explanation of A
  • (C) A is true but R is false.
  • (D) A is false but R is true.
When a ray of light travels from a denser medium to a rarer medium then
  • (A) It speeds up and bends away from the normal
  • (B) It speeds up and bends towards the normal
  • (C) It slows down and bends away from the normal
  • (D) It slows down and bends towards the normal
For which of the following is the field of view maximum?
  • (A) Concave mirror
  • (B) Convex mirror
  • (C) Plane mirror
  • (D) Cylindrical mirror
According to the modern theory of nature of light, the light has
  • (A) Wave nature only
  • (B) Particle nature only
  • (C) Both wave and particle (dual) nature
  • (D) Neither particle nature nor wave nature
The mirror having reflection surface curved outward
  • (A) Plane mirror
  • (B) Concave mirror
  • (C) Convex mirror
  • (D) Cylindrical mirror

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