1
JEE Main 2019 (Online) 8th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
An upright object is placed at a distance of
40 cm in front of a convergent lens of focal
length 20 cm. A convergent mirror of focal
length 10 cm is placed at a distance of 60 cm
on the other side of the lens. The position and
size of the final image will be :
2
JEE Main 2019 (Online) 8th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
In figure, the optical fiber is $$l$$ = 2m long and
has a diameter of d = 20 μm. If a ray of light
is incident on one end of the fiber at angle
$$\theta _1$$ = 40°, the number of reflection it makes
before emerging from the other end is close to:
(refractive index of fibre is 1.31 and
sin 40° = 0.64)


3
JEE Main 2019 (Online) 12th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
A plano-convex lens (focal length f2, refractive index $$\mu $$2, radius of curvature R) fits exactly into a plano-concave lens (focal length f1, refractive index $$\mu $$1, radius of curvature R). Their plane surfaces are parallel to each other. Then, the focal length of the combination will be :
4
JEE Main 2019 (Online) 12th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
Formation of real image using a biconvex lens is shown below :
If the whole set up is immersed in water without disturbing the object and the screen positions, what will one observe on the screen ?

If the whole set up is immersed in water without disturbing the object and the screen positions, what will one observe on the screen ?
Questions Asked from Geometrical Optics (MCQ (Single Correct Answer))
Number in Brackets after Paper Indicates No. of Questions
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