1
JEE Main 2024 (Online) 8th April Evening Shift
MCQ (Single Correct Answer)
+4
-1

The position of the image formed by the combination of lenses is :

JEE Main 2024 (Online) 8th April Evening Shift Physics - Geometrical Optics Question 4 English

A
$$15 \mathrm{~cm}$$ (right of second lens)
B
$$30 \mathrm{~cm}$$ (right of third lens)
C
$$30 \mathrm{~cm}$$ (left of third lens)
D
$$15 \mathrm{~cm}$$ (left of second lens)
2
JEE Main 2024 (Online) 8th April Morning Shift
MCQ (Single Correct Answer)
+4
-1

Critical angle of incidence for a pair of optical media is $$45^{\circ}$$. The refractive indices of first and second media are in the ratio:

A
$$1: 2$$
B
$$1: \sqrt{2}$$
C
$$2: 1$$
D
$$\sqrt{2}: 1$$
3
JEE Main 2024 (Online) 6th April Evening Shift
MCQ (Single Correct Answer)
+4
-1

For the thin convex lens, the radii of curvature are at $$15 \mathrm{~cm}$$ and $$30 \mathrm{~cm}$$ respectively. The focal length the lens is $$20 \mathrm{~cm}$$. The refractive index of the material is :

A
1.2
B
1.5
C
1.4
D
1.8
4
JEE Main 2024 (Online) 4th April Morning Shift
MCQ (Single Correct Answer)
+4
-1

An effective power of a combination of 5 identical convex lenses which are kept in contact along the principal axis is $$25 \mathrm{D}$$. Focal length of each of the convex lens is:

A
50 cm
B
20 cm
C
25 cm
D
500 cm
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