WB JEE 2022 | Geometrical Optics Question 9 | Physics

WB JEE 2022

MCQ (Single Correct Answer)

-0.25

The human eye has an approximate angular resolution of $$\theta$$ = 5.8 $$\times$$ 10^$$-$$4 rad and typical photo printer prints a minimum of 300 dpi (dots per inch, 1 inch = 2.54 cm). At what minimal distance d should a printed page be held so that one does not see the individual dots?

20.32 cm

29.50 cm

14.59 cm

6.85 cm

WB JEE 2021

MCQ (Single Correct Answer)

-0.25

A spherical convex surface of power 5 D separates object and image space of refractive indices 1.0 and $$4\over3$$ , respectively. The radius of curvature of the surface is

20 cm

1 cm

4 cm

5 cm

WB JEE 2021

MCQ (Single Correct Answer)

-0.25

WB JEE 2021 Physics - Geometrical Optics Question 10 English

The cross-section of a reflecting surface is represented by the equation x² + y² = R² as shown in the figure. A ray travelling in the positive x-direction is directed toward positive y-direction after reflection from the surface at point M. The coordinate of the point M on the reflecting surface is

$$\left( {{R \over {\sqrt 2 }},{R \over {\sqrt 2 }}} \right)$$

$$\left( { - {R \over 2}, - {R \over 2}} \right)$$

$$\left( { - {R \over {\sqrt 2 }},{R \over {\sqrt 2 }}} \right)$$

$$\left( {{R \over {\sqrt 2 }}, - {R \over {\sqrt 2 }}} \right)$$

WB JEE 2020

MCQ (Single Correct Answer)

-0.25

A tennis ball hits the floor with a speed v at an angle $$\theta $$ with the normal to the floor. If the collision is inelastic and the coefficient of restitution is $$\varepsilon $$, what will be the angle of reflection?

$${\tan ^{ - 1}}\left( {{{\tan \theta } \over \varepsilon }} \right)$$

$${\sin ^{ - 1}}\left( {{{\sin \theta } \over \varepsilon }} \right)$$

$$\theta $$$$\varepsilon $$

$$\theta {{2\varepsilon } \over {\varepsilon + 1}}$$

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