TN Online TestSamacheer Kalvi practice

Optics Book Back One Mark Online Test (10th Standard Science)

Pick how many questions you want and set a time limit, then start. You'll get your score at the end with the correct answer and an explanation for every question. Free, in Tamil and English — 10 questions available.

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The refractive index of four substances A, B, C and D are 1.31, 1.43, 1.33, 2.4 respectively. The speed of light is maximum in

A.Substance A B.Substance B C.Substance C D.Substance D

Where should an object be placed so that a real and inverted image of same size is obtained by a convex lens?

A.at f B.at 2f C.infinity D.between f and 2f

A small bulb is placed at the principal focus of a convex lens. When the bulb is switched on, the lens will produce

A.a convergent beam of light B.a divergent beam of light C.a parallel beam of light D.a coloured beam of light

Magnification of a convex lens is

A.positive B.negative C.either positive or negative D.zero

A convex lens forms a real, diminished point sized image at focus. Then the position of the object is at

A.focus B.infinity C.at 2f D.between f and 2f

Power of a lens is -4D, then its focal length is

A.4 m B.-40 m C.-0.25 m D.-2.5 m

In a myopic eye, the image of the object is formed

A.behind the retina B.on the retina C.in front of the retina D.on the blind spot

The eye defect 'presbyopia' can be corrected by

A.convex lens B.concave lens C.convex mirror D.bifocal lenses

Which of the following lens would you prefer to use while reading small letters found in a dictionary?

A.A convex lens of focal length 5 cm B.A concave lens of focal length 5 cm C.A convex lens of focal length 10 cm D.A concave lens of focal length 10 cm

Q10

If VB, VG, VR be the velocity of blue, green and red light respectively in a glass prism, then which of the following statement gives the correct relation?

A.VB = VG = VR B.VB > VG > VR C.VB < VG < VR D.VB < VG > VR

More for this chapter

Book Back Questions10 textbook MCQs · solved Additional MCQs15 extra MCQs · solved Practice TestInteractive · instant score Additional MCQ TestTest yourself on the extra set Study NotesConcepts & methods Formula SheetAll key formulas

About this Optics test

This free online practice test covers Optics from the 10th Standard Science (Samacheer Kalvi) syllabus. Choose the number of questions and an optional time limit, then answer and submit — everything is checked in your browser, with the correct answers and a worked explanation shown at the end. For the full solutions to every question in this set, see the solved MCQs page.

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1 Laws of Motion 3 Thermal Physics 4 Electricity 5 Acoustics 6 Nuclear Physics 7 Atoms and Molecules 8 Periodic Classification of Elements 9 Solutions 10 Types of Chemical Reactions 11 Carbon and Its Compounds 12 Plant Anatomy and Plant Physiology 13 Structural Organisation of Animals 14 Transportation in Plants and Circulation in Animals 15 Nervous System 16 Plant and Animal Hormones 17 Reproduction in Plants and Animals 18 Genetics 19 Origin and Evolution of Life 20 Breeding and Biotechnology 21 Health and Diseases 22 Environmental Management 23 Visual Communication