Test Details

Optics 10

Optics

Oct 29, 1:00 PM

90 minutes

Oct 29, 2:30 PM

40.0 marks

MCQ

40 questions

rajesh bhide

Bhide Coaching Classes, Seoni. OUR CLASS IS PROVIDING SUPPORT TO ALL SCIENCE STUDENTS PREPARING FOR IIT/JEE/NEET/ICAR/PAT/GNTST/PNST EXAMS AS WELL AS FOR REGULAR 9TH TO 12TH CLASSES.WE ARE RUNNING OUR CLASSES FROM 1993-94.NEARLY 15000 STUDENTS GOT SUPPORT FROM US.

Class Details

Mathematics

Science

10 Th CLASS ENG

Mathematics

Science

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Question Text

Question 1 :
Which of the following quantities changes during the process of scattering?

Question 3 :
An astronaut in a spaceship the sky appears black due to:

Question 4 :
In the white light of sun, maximum scattering by the air molecules present in the earth's atmosphere is for:<br>

Question 6 :
Fill in the blank spaces by choosing the correct word.A prism is a piece of transparent material having three rectangular surfaces and .......... triangular surfaces.

Question 7 :
CV Raman got the Nobel Prize for his experiment on :

Question 11 :
The incident ray, the normal at the point of incidence and the refracted ray:

Question 12 :
A straight line passing through the two centres of curvature of lens is called

Question 13 :
A plane glass plate is placed over a various coloured letters (violet, green, yellow, red). The letter which appears to raised more

Question 14 :
The radii of curvature of both the sides of a convex lens are $$15cm$$ and if the refractive index of material of the lens is $$1.5$$. Then focal length of lens in air is _______cm.

Question 16 :
State whether true or false.<br/>A concave mirror always forms erect and diminished images.

Question 17 :
A convex lens is used to form real image of an object on a screen. It is observed that even when the positions of the object and that screen are fixed are two position of the lens to form real images. If the heights of the images are $$4\ cm$$ and $$9\ cm$$ respectively the height of the object is

Question 18 :
Which of the following term is not associated with a lens ?

Question 19 :
What type of mirror can be used alone to obtain a real image of a real object?

Question 20 :
When a ray of light passes through a rectangular slab, made up of some transparent material other than glass, the emergent ray is

Question 21 :
The image formed by a concave mirror is observed to be virtual, erect and larger than the object. Where should be the position of the object?

Question 24 :
The power of a lens being $$+4$$ dioptres suggests that it is a

Question 25 :
Assertion: Magnetic field lines are continuous and closed. Reason: Magnification of a convex mirror is always positive, but that of a concave mirror may be both positive or negative.

Question 26 :
Find the power (with sign) of a concave lens of focal length $$20cm$$.<br/>

Question 27 :
No matter where the object is placed in front of a mirror, the image formed is virtual, erect and smaller than the object. This mirror must be:

Question 28 :
A spherical mirror and a thin spherical lens have each a focal length of $$-15$$ cm. The mirror and lens are likely to be :<br/>

Question 29 :
Find the focal length of a convex lens, if its power is +2.0 D.

Question 32 :
A ray of light is incident perpendicularly on a glass slab. The angle of incidence is :

Question 34 :
Which of the following term is not associated with a lens?

Question 35 :
The focal length of a combination of lenses formed with lenses having powers of $$+2.50\ D$$ and $$-3.75\ D$$ will be

Question 37 :
Lens A produces a magnification of -0.8 whereas lens B produces a magnification of +0.8. Which one of the following applies to lenses A and B?

Question 38 :
State whether true or falseA convex mirror is used for obtaining a real and magnified image.

Question 39 :
The focal length of a convex lens is $$5\,cm$$,where should the object be placed to get  a real image with same size as that of object:

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