NEET 2023 | Geometrical Optics Question 10 | Physics

Light travels a distance $$\mathrm{x}$$ in time $$t_{1}$$ in air and $$10 \mathrm{x}$$ in time $$t_{2}$$ in another denser medium. What is the critical angle for this medium?

$$\sin ^{-1}\left(\frac{10 \mathrm{t}_{2}}{\mathrm{t}_{1}}\right)$$

$$\sin ^{-1}\left(\frac{t_{1}}{10 t_{2}}\right)$$

$$\sin ^{-1}\left(\frac{10 t_{1}}{t_{2}}\right)$$

$$\sin ^{-1}\left(\frac{t_{2}}{t_{1}}\right)$$

NEET 2023

MCQ (Single Correct Answer)

-1

In the figure shown here, what is the equivalent focal length of the combination of lenses (Assume that all layers are thin) ?

NEET 2023 Physics - Geometrical Optics Question 11 English

$$-40 \mathrm{~cm}$$

$$-100 \mathrm{~cm}$$

$$-50 \mathrm{~cm}$$

$$40 \mathrm{~cm}$$

NEET 2023

MCQ (Single Correct Answer)

-1

Two thin lenses are of same focal lengths $$(f)$$, but one is convex and the other one is concave. When they are placed in contact with each other, the equivalent focal length of the combination will be :

$$f / 4$$

$$f / 2$$

Infinite

Zero

NEET 2022 Phase 2

MCQ (Single Correct Answer)

-1

During a cloudy day, a primary and a secondary rainbow may be created, then the :

secondary rainbow is due to single internal reflection and is formed above the primary one.

primary rainbow is due to double internal reflection and is formed above the secondary one.

primary rainbow is due to double internal reflection and is formed below the secondary one.

secondary rainbow is due to double internal reflection and is formed above the primary one.

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