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A person’s eye is at a height of $1.5 m$ . He stands in front of a $0.3 m$ long plane mirror which is $0.8 m$ above the ground. The length of the image he sees of himself is:

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Important Questions on Ray Optics

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Alpha Question Bank for Engineering: Physics>Chapter 30 - Ray Optics>Exercise - 1>Q 69

An unnumbered wall clock shows time

04 : 25 : 37

, where

1^{st}

term represents hours,

2^{nd}

represents minutes and the last term represents seconds. What time will its image in a plane mirror show?

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Alpha Question Bank for Engineering: Physics>Chapter 30 - Ray Optics>Exercise - 1>Q 70

An object and a plane mirror are as shown in the figure. Mirror is moved with velocity $V$ as shown. The velocity of image is:

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Alpha Question Bank for Engineering: Physics>Chapter 30 - Ray Optics>Exercise - 1>Q 71

A plane mirror is moving with velocity

4 \hat{i} + 5 \hat{j} + 8 \hat{k}

. A point object in front of the mirror moves with a velocity

3 \hat{i} + 4 \hat{j} + 5 \hat{k}

. Here

\hat{k}

is along the normal to the plane mirror and facing towards the object. The velocity of the image is:

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Alpha Question Bank for Engineering: Physics>Chapter 30 - Ray Optics>Exercise - 1>Q 72

Two plane mirrors,

A

and

B

, are parallel to each other and placed

20 cm

apart. An object is kept in between them at

15 cm

from

A

. Out of the following, at which point, an image is not formed in the mirror

A

? (Distance is measured from mirror

A

)

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Alpha Question Bank for Engineering: Physics>Chapter 30 - Ray Optics>Exercise - 1>Q 73

An object of height

1 cm

is kept perpendicular to the principal axis of a convex mirror of radius of curvature

20 cm

. If the distance of the object from the mirror is

20 cm

then the distance (in

cm

) between heads of the image and the object will be:

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Alpha Question Bank for Engineering: Physics>Chapter 30 - Ray Optics>Exercise - 1>Q 74

A point object is kept between a plane mirror and a concave mirror facing each other. The distance between the mirrors is

22.5 cm

. Plane mirror is placed perpendicular to the principal axis of a concave mirror. The radius of curvature of the concave mirror is

20 cm

. What should be the distance of the object from the concave mirror so that after two successive reflections the final image is formed on the object itself? Consider the first reflection from concave mirror)

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Alpha Question Bank for Engineering: Physics>Chapter 30 - Ray Optics>Exercise - 1>Q 75

A square $A B C D$ of side $1 mm$ is kept at distance $15 cm$ infront of the concave mirror as shown in the figure. The focal length of the mirror is $10 cm$ . The length of the perimeter of its image will be (nearly):

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Alpha Question Bank for Engineering: Physics>Chapter 30 - Ray Optics>Exercise - 1>Q 76

In the figure shown find the total magnification after two successive reflections first on $M_{1}$ and then on $M_{2}$ .

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A person’s eye is at a height of 1.5 m. He stands in front of a 0.3 m long plane mirror which is 0.8 m above the ground. The length of the image he sees of himself is:

Important Questions on Ray Optics

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A person’s eye is at a height of $1.5 m$ . He stands in front of a $0.3 m$ long plane mirror which is $0.8 m$ above the ground. The length of the image he sees of himself is: