JEE Advanced 2018 Paper 2 Offline | Geometrical Optics Question 21 | Physics

JEE Advanced 2018 Paper 2 Offline

MCQ (More than One Correct Answer)

-1

A wire is bent in the shape of a right angled triangle and is placed in front of a concave mirror of focal length $$f,$$ as shown in the figure. Which of the figures shown in the four options qualitatively represent(s) the shape of the image of the bent wire? (These figures are not to scale.)

JEE Advanced 2018 Paper 2 Offline Physics - Geometrical Optics Question 54 English

JEE Advanced 2018 Paper 2 Offline Physics - Geometrical Optics Question 54 English

JEE Advanced 2018 Paper 2 Offline Physics - Geometrical Optics Question 54 English Option 1

JEE Advanced 2018 Paper 2 Offline Physics - Geometrical Optics Question 54 English Option 2

JEE Advanced 2018 Paper 2 Offline Physics - Geometrical Optics Question 54 English Option 3

JEE Advanced 2018 Paper 2 Offline Physics - Geometrical Optics Question 54 English Option 4

JEE Advanced 2017 Paper 1 Offline

MCQ (More than One Correct Answer)

-1

For an isosceles prism of angle $$A$$ and refractive index $$\mu $$, it is found that the angle of minimum deviation $${\delta _m} = A.$$

Which of the following options is/are correct?

For the angle of incidence $${i_1} = A,$$ the ray inside the prism is parallel to the base of the prism

For this prism, the refractive index $$\mu $$ and the angle of prism $$A$$ are related as

$$A = {1 \over 2}{\cos ^{ - 1}}\left( {{\mu \over 2}} \right)$$

At minimum deviation, the incident angle $${i_1}$$ and the refracting angle $${r_1}$$ at the first refracting surface are related by $${r_1} = \left( {{i_1}/2} \right)$$

For this prism, the emergent ray at the second surface will be tangential to the surface when the angle of incidence at the first surface is

$${i_1} = {\sin ^{ - 1}}\left[ {\sin A\sqrt {4{{\cos }^2}{A \over 2} - 1} - \cos A} \right]$$

JEE Advanced 2016 Paper 1 Offline

MCQ (More than One Correct Answer)

-2

A plano-convex lens is made of material of refractive index n. When a small object is placed 30 cm away in front of the curved surface of the lens, an image of double the size of the object is produced. Due to reflection from the convex surface of the lens, another faint image is observed at a distance of 10 cm away form the lens. Which of the following statement(s) is(are) true?

The refractive index of the lens is 2.5

The radius of curvature of the convex surface is 45 cm

The faint image is erect and real

The focal length of the lens is 20 cm

JEE Advanced 2016 Paper 1 Offline

MCQ (More than One Correct Answer)

-2

A transparent slab of thickness d has a refractive index n (z) that increases with z. Here, z is the vertical distance inside the slab, measured from the top. The slab is placed between two media with uniform refractive indices n₁ and n₂ (> n₁), as shown in the figure. A ray of light is incident with angle $$\theta$$_i from medium 1 and emerges in medium 2 with refraction angle $$\theta$$_f with a lateral displacement $l$.

JEE Advanced 2016 Paper 1 Offline Physics - Geometrical Optics Question 45 English

JEE Advanced 2016 Paper 1 Offline Physics - Geometrical Optics Question 45 English

Which of the following statement(s) is (are) true?

$l$ is dependent on n(z)

n₁ sin$$\theta$$_i = (n₂ $$-$$ n₁) sin$$\theta$$_f

n₁ sin$$\theta$$_i = n₂ sin$$\theta$$_f

$l$ is independent of n₂

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