A convex mirror has a focal length f. A real object is placed at a distance of f 2 from the pole. Find out the position, magnification and nature of the image.

The mirror formula is 1 v + 1 u = 1 f , The focal length is taken positive for convex mirror. The position of the object u = - f 2 , 1 v - 2 f = 1 f ⇒ v = f 3 , The magnification is m = - v u ⇒ m = - f 3 - f 2 ⇒ m = + 2 3 , The image formed is virtual, erect and smaller than object.

E M B I B E

Beta Question Bank for Medical: Physics>Chapter 30 - Ray Optics>BEGINNER'S BOX - 1>Q 2

EASY

NEET

IMPORTANT

Earn 100

An object as 'L' is placed between two parallel plane mirrors as shown. In the first seven closest images, how many laterally inverted images are formed?

100% studentsanswered this correctly

Important Questions on Ray Optics

MEDIUM

NEET

IMPORTANT

Beta Question Bank for Medical: Physics>Chapter 30 - Ray Optics>BEGINNER'S BOX - 1>Q 3

A plane mirror is placed horizontally on level ground at a distance of 60 m from the foot of a water. Light rays from the top of tower falling just on the edge of the mirror suffers a deviation of 90º. The height of the tower is :-

EASY

NEET

IMPORTANT

Beta Question Bank for Medical: Physics>Chapter 30 - Ray Optics>BEGINNER'S BOX - 1>Q 6

The correct mirror-image of the figure given is:-

Question Image

EASY

NEET

IMPORTANT

Beta Question Bank for Medical: Physics>Chapter 30 - Ray Optics>BEGINNER'S BOX - 2>Q 3

A convex mirror has a focal length f. A real object is placed at a distance of

\frac{f}{2}

from the pole. Find out the position, magnification and nature of the image.

HARD

NEET

IMPORTANT

Beta Question Bank for Medical: Physics>Chapter 30 - Ray Optics>BEGINNER'S BOX - 2>Q 7

A small candle,

2.5 c m

in size is placed at

27 c m

in front of a concave mirror of radius of curvature

36 c m

. At what distance from the mirror should a screen be placed in order to obtain a sharp image? Describe the nature and size of the image. If the candle is moved closer to the mirror, how would the screen have to be moved?

EASY

NEET

IMPORTANT

Beta Question Bank for Medical: Physics>Chapter 30 - Ray Optics>BEGINNER'S BOX - 3>Q 2

A light ray is moving from denser (refractive index =

μ

) to air. If the angle of incidence is half the angle of refraction, find out the angle of refraction.

MEDIUM

NEET

IMPORTANT

Beta Question Bank for Medical: Physics>Chapter 30 - Ray Optics>BEGINNER'S BOX - 5>Q 2

There is a small air bubble inside a glass sphere ( $μ$ = 1.5) of radius 10 cm. The bubble is 4 cm below the surface and is viewed normally from the outside as shown in figure. Find the apparent depth of the bubble.

Question Image