10th science Chapter 11 objective English medium

For chapter 10 click here 👇👇

Chapter 10 reflection and refrection of light

By vikas lodhi

VENUS BHATNAGAR SCIENCE INSTITUTE INDORE 

                          CHAPTER -  11

   (HUMAN EYES AND COLORFUL WORLD) 

Question 1. When our eye see a near object, its lens?
(a) Expand
(b) Remain same
(c) Contract
(d) None

Answer: (a) Expand

Question 2. What transfer information from eyes to brain?
(a) Neuro trans
(b) Iris
(c) Optical nerve
(d) Retina

Answer: (c) Optical nerve

Question 3. What controls the size of pupil?
(a) Iris
(b) Cornea
(c) Lens
(d) Aqueous humour

Answer: (a) Iris

Question 4. Near point of human eye is approximately:
(a) 50 cm
(b) 1 m
(c) 25 cm
(d) 25 m

Answer: (c) 25 cm

Question 5. Far point of human eye is approximately:
(a) 10 km
(b) infinity
(c) 5 km
(d) 25 cm

Answer: (a) 10 km

Question 6. Cataract is caused mostly to
(a) Farm workers
(b) Factory workers
(c) Kids watching TV and Mobiles
(d) Old age people

Answer: (d) Old age people

Question 7. In which kind of defect, image of a distant object is formed in front of retina?
(a) Myopia
(b) Cataract
(c) Hypermetropia
(d) Presbyopia

Answer:  (a) Myopia

Question 8. A concave lens with correct power can help a person with
(a) Hypermetropia
(b) Myopia
(c) Presbyopia
(d) None of these

Answer: (b) Myopia

Question 9. Adjusting “cording to object’s distance from eye is called
(a) Vision power
(b) Motivation
(c) Accommodation power
(d) Presbyopia

Answer: (c) Accommodation power

Question 10. For an eye donation, eyes must be removed within ……… after death.
(a) 8 hours
(b) 25 hours
(c) 4-6 hours
(d) None.

Answer: (c) 4-6 hours

Question 11. What type of lens are required to correct a vision of hypermetropic eyes?
(a) Concave
(b) Convex
(c) both
(d) Plane mirror is required ;

Answer: (b) Convex

Question 12. When we pass a light through a prism, it is
(a) Refracted
(b) Scattered
(c) Reflected
(d) Inverted

Answer: (a) Refracted

Question 13. Which colour lies in centre of a rainbow?
(a) Red
(b) Violet
(c) Yellow
(d) Green

Answer: (d) Green

Question 14. If two prism are placed inverted to each other and white light is passed from one prism, what will we get refracted by other prism?
(a) VIBGYO
(b) white light
(c) All light will be absorbed
(d) Black spot

Answer: (b) white light

Question 15. We see twinkling of stars due to:
(a) Reflection of light.
(b) Refraction of light
(c) Scattering of light
(d) Polarization of light

Answer: (b) Refraction of light

Question 16. Particle looks moving in smoke filled place, when a light beam coming from a whole passes through it, because:
(a) Tyndall effect
(b) atmospheric refraction
(c) White light spectrum
(d) reflection

Answer: (a) Tyndall effect

For chapter 12th click here 👇👇

Chapter 12 electricity

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