English
Maharashtra State BoardSSC (English Medium) 10th Standard

State the different positions of the source of light with respect to the concave mirror in Floodlights.

Advertisements
Advertisements

Questions

State the different positions of the source of light with respect to the concave mirror in Floodlights.

Describe the positions of the source of light with respect to a concave mirror in Floodlight.

One Line Answer
Advertisements

Solution

In a floodlight, the light source is slightly beyond the radius of curvature, which gives us the right light.

shaalaa.com
  Is there an error in this question or solution?
Chapter 11: Reflection of Light - Exercise [Page 127]

APPEARS IN

Balbharati Science and Technology [English] Standard 9 Maharashtra State
Chapter 11 Reflection of Light
Exercise | Q 1. b. 3. | Page 127

RELATED QUESTIONS

With the help of an appropriate ray diagram, state the sign conventions for reflection by a spherical mirror.


"A concave mirror of focal length 15 cm can form a magnified, erect as well as inverted image of an object placed in front of it." Justify this statement stating the position of the object with respect to the pole of the mirror in both the cases for obtaining the images.


It is desired to obtain an erect image of an object, using concave mirror of focal length of 12 cm.

Will the image be smaller or larger than the object? Draw ray diagram to show the formation of image in this case.


To determine the approximate value of the focal length of a given concave mirror, you focus the image of a distant object formed by the mirror on a screen. The image obtained on the serene, as compared to the object is always:

(a) Laterally inverted and diminished

(b) Inverted and diminished

(c) Erect and diminished

(d) Erect and highly diminished


Draw the following diagram in which a ray of light is incident on a concave/convex mirror on your answer sheet. Show the path of this ray, after reflection, in each case.


Draw ray diagrams to show the principal focus of a concave mirror.


Draw ray diagrams to show the principal focus of a convex mirror.


To construct ray diagrams, two rays of light are generally so chosen that it is easy to determine their directions after reflection from a mirror. Choose two such rays and state the path/direction of these rays after reflection from a concave mirror. Use these two rays to find the position and nature of the image of an object placed at a distance of 8 cm from a concave mirror of focal length 12 cm.


We wish to obtain an erect image of an object, using a concave mirror of focal length 15 cm. What should be the range of distance of the object from the mirror? What is the nature of the image? Is the image larger or smaller than the object? Draw a ray diagram to show the image formation in this case.


Which type of mirror is used by a dentist?


For a convex mirror, parallel rays of light appear to diverge from a point called the ______.


Explain why, a ray of light passing through the centre of curvature of a concave mirror gets reflected back along the same path.


Make labelled ray diagrams to illustrate the formation of:

  1. a real image by a converging mirror.
  2. a virtual image by a converging mirror.

Mark clearly the pole, focus, centre of curvature and position of object in each case.


Name the type of mirror used by dentists. How does it help? 


Explain why, concave mirrors are used as shaving mirrors.


An object 3 cm high is placed at a distance of 8 cm from a concave mirror which produces a virtual image 4.5 cm high:

(i) What is the focal length of the mirror?
(ii) What is the position of image?
(iii) Draw a ray-diagram to show the formation of image.


An object of 5.0 cm size is placed at a distance of 20.0 cm from a converging mirror of focal length 15.0 cm. At what distance from the mirror should a screen be placed to get the sharp image? Also calculate the size of the image.


An object is placed just outside the principal focus of concave mirror. Draw a ray diagram to show how the image is formed, and describe its size, position and nature.


An object is 24 cm away from a concave mirror and its image is 16 cm from the mirror. Find the focal length and radius of curvature of the mirror, and the magnification of the image.


Between which two points of concave mirror should an object be placed to obtain a magnification of:

(a) −3
(b) +25
(c) −0.4


Which of the following are concave mirrors and which convex mirrors?

Shaving mirrors, Car headlight mirror, Searchlight mirror, Driving mirror, Dentist’s inspection mirror, Torch mirror, Staircase mirror in a double-decker bus, Make-up mirror, Solar furnace mirror, Satellite TV dish, Shop security mirror.


Name the lens which can concentrate sun's rays to a point and burn a hole in a piece of paper. 


Draw a ray diagram to show the formation of image of an object placed on the principal axis of a convex mirror. State the position, size and nature of the image. What happens to the image as the object is moved away from the mirror?


In the following diagram. MM' is a concave mirror and AB is an object. Draw on your answer-sheet a ray diagram to show the formation of image of this object.


A student determines the focal length of a device 'X' by focusing the image of a distant object on a screen placed 20 cm from the device on the same side as the object. The device 'X' is

(a) Concave lens of focal length 10 cm

(b) Convex lens of focal length 20 cm

(c) Concave mirror of focal length 10 cm

(d) Concave mirror of focal length 20 cm


Consider the following properties of virtual images:

  1. cannot be projected on the screen
  2. are formed by both concave and convex lens
  3. are always erect
  4. are always inverted

The correct properties are:


Under which of the following conditions a concave mirror can form an image larger than the actual object?


A concave mirror produces a magnification of +4. The object is placed ______.


An object at a distance of 30 cm from a
concave mirror gets its image at the same point. The focal length of the mirror is ______.


While looking at the above diagram, Nalini concluded the following.

  1. the image of the object will be a virtual one.
  2. the reflected ray will travel along the same path as the incident ray but in opposite direction.
  3. the image of the object will be inverted.
  4. this is a concave mirror and hence the focal length will be negative.

Which one of the above statements are correct?


You are provided with a convex mirror, a concave mirror, a convex lens and a concave lens. You can get an inverted image from


______ mirrors make things look larger when objects are placed close to them.


The image formed by a concave mirror is real, inverted and of the same size as that of the object, the position of the object should be ______.


To obtain an image twice the size of the object, between which two points related to a concave mirror should an object be placed?


Which type of mirror is used in the following?

Head lamps of a car


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×