A boy uses spectacles of focal length -50 cm. Name the defect of the vision he is suffering from.(a) Astigmatism(b) Hypermetropia(c) Myopia(d) PresbyopiaThe question was posed to me in quiz.I want to ask this question from Optical Instruments topic in portion Ray Optics and Optical Instruments of Physics – Class 12

A boy uses spectacles of focal length -50 cm. Name the defect of the v

1.	A boy uses spectacles of focal length -50 cm. Name the defect of the vision he is suffering from.(a) Astigmatism(b) Hypermetropia(c) Myopia(d) PresbyopiaThe question was posed to me in quiz.I want to ask this question from Optical Instruments topic in portion Ray Optics and Optical Instruments of Physics – Class 12
Answer» The correct CHOICE is (c) Myopia For explanation I would say: As the focal length is negative, the lens used is CONCAVE. When a person is prescribed a concave lens, then the person is considered to be SUFFERING from MYOPIC. Therefore, the boy is suffering from myopia.

Discussion

No Comment Found

Related InterviewSolutions

Calculate the dispersive power of crown glass where μV=1.456 and μR=1.414.(a) 0.0096(b) 0.45(c) 0.96(d) 0.096I got this question by my college director while I was bunking the class.I'm obligated to ask this question of Ray Optics in portion Ray Optics and Optical Instruments of Physics – Class 12
How much intensity of the image is increased if the diameter of the objective of a telescope is doubled?(a) Two times(b) Four times(c) Eight times(d) Sixteen timesThe question was posed to me in quiz.The origin of the question is Optical Instruments in portion Ray Optics and Optical Instruments of Physics – Class 12
The upper part of the bi-focal lens is a convex lens while its lower part is a concave lens.(a) True(b) FalseThe question was posed to me in examination.The origin of the question is Optical Instruments topic in section Ray Optics and Optical Instruments of Physics – Class 12
How many kinds of rainbows are there, generally?(a) 1(b) 2(c) 3(d) 4I got this question in an interview.This intriguing question originated from Ray Optics in section Ray Optics and Optical Instruments of Physics – Class 12
What is the angle between the incident ray and the emergent ray in a prism called?(a) Angle of deviation(b) Angle of refraction(c) Angle of reflection(d) Angle of dispersionI have been asked this question by my college professor while I was bunking the class.My enquiry is from Ray Optics in portion Ray Optics and Optical Instruments of Physics – Class 12
A fly is sitting on the objective of a telescope. What will be its effect on the final image of the distant object?(a) Reduces(b) Increases(c) Remains constant(d) IndefiniteThis question was addressed to me during an online exam.Question is from Optical Instruments topic in chapter Ray Optics and Optical Instruments of Physics – Class 12
Find the wrong statement.(a) Clouds appear white for most of the day because the sun radiates all visible wavelengths of light(b) The rays have to travel a shorter distance than usual at sunrise and sunset(c) Danger signals are red because red color gets scattered the least(d) The sky is blue because blue light is scattered more than other colors since it travels as shorter wavesThis question was posed to me during an internship interview.I need to ask this question from Ray Optics topic in section Ray Optics and Optical Instruments of Physics – Class 12
What is the difference in a deviation between any two colors called?(a) Linear dispersion(b) Angular dispersion(c) Mean deviation(d) Mean dispersionThe question was asked in an online interview.Query is from Ray Optics in chapter Ray Optics and Optical Instruments of Physics – Class 12
Find the magnification of the lens if the focal length of the lens is 10 cm and the size of the image is -30 cm.(a) 2(b) 3(c) 4(d) 5This question was posed to me in final exam.I would like to ask this question from Ray Optics in section Ray Optics and Optical Instruments of Physics – Class 12
Calculate the focal length of a biconvex lens if the radii of its surfaces are 50 cm and 20 cm, and index of refraction of the lens glass = 1.2.(a) 0.014 cm(b) 0.715 cm(c) 0.14 cm(d) 71.5 cmI got this question in examination.Origin of the question is Ray Optics topic in section Ray Optics and Optical Instruments of Physics – Class 12

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment