11th Physics Focus Guide. We covered all the 11th Physics Focus Guide MCQs in this post for free so that you can practice well for the exam.
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11th Physics Focus Guide Objective for Students
Two convex lenses with power 2 D are kept in contact with each other. The focal length of the combined lens system is
(a) 0.10 m
(b) 2 m
(c) 4 m
(d) 0.25 m
Option d – 0.25 m
The splitting of different colors of light in a prism is
(a) Reflection of light
(b) Dispersion of light
(c) Diffraction of light
(d) Refraction of light
Option b – Dispersion of light
The number of colors contained in the sunlight is
(a) 3
(b) 5
(c) 6
(d) 7
Option d – 7
The optical phenomenon that is primarily responsible for the observation of a rainbow on a rainy day is
(a) diffraction
(b) interference
(c) dispersion
(d) reflection
Option c – dispersion
Which of these travels in glass with minimum velocity?
(a) red light
(b) violet light
(c) green light
(d) yellow light
Option b – violet light
What is the color of the light emitted by the Sun?
(a) White
(b) Red
(c) Yellow
(d) Orange
Option a – White
When a beam of white light passes through a glass prism, the color of the light beam that deviates the least is
(a) blue
(b) red
(c) green
(d) violet
Option b – red
When a beam of white light is allowed to fall on a prism, the maximum deviation of the emerging light occurs for
(a) red light
(b) violet light
(c) yellow light
(d) blue light
Option b – violet light
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