मराठी
सी.आई.एस.सी.ई.आयसीएसई ICSE Class 8

Draw a ray diagram to show the formation of image of an object placed between the focus and centre of curvature of a concave mirror. State the position, size and nature of the image. - Physics

Advertisements
Advertisements

प्रश्न

Draw a ray diagram to show the formation of image of an object placed between the focus and centre of curvature of a concave mirror. State the position, size and nature of the image.

आकृती
Advertisements

उत्तर

OBJECT PLACED BETWEEN C and F :

A real, inverted and magnified image is formed beyond the centre of curvature
The image formed A’B’ is beyond C ← position
Enlarged ← size
inverted and real ← nature

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 5: Light Energy - Short/long Answer Question [पृष्ठ १०१]

APPEARS IN

सेलिना Concise Physics [English] Class 8 ICSE
पाठ 5 Light Energy
Short/long Answer Question | Q 38 | पृष्ठ १०१

संबंधित प्रश्‍न

The angle between an incident ray and the plane mirror is 30°. The total angle between the incident ray and reflected ray will be:

(a) 30°
(b) 60°
(c) 90°
(d) 120°


 Define (i) principal focus of a concave mirror, and (ii) focal length of a concave mirror.


Which type of mirror is used in a solar furnace? Support your answer with reason.


Explain why, concave mirrors are used as shaving mirrors.


How far should an object be placed from the pole of a converging mirror of focal length 20cm to form a real image of the size exactly `1/4`th the size of the object?


At what distance from a concave mirror of focal length 10 cm should an object be placed so that: 

its virtual image is formed 20 cm from the mirror? 


The diagram shows a dish antenna which is used to receive television signals from a satellite. The antenna (signal detector) is fixed in front of the curved dish.
Figure

(a) What is the purpose of the dish?
(b) Should it be concave or convex?
(c) Where should the antenna be positioned to receive the strongest possible signals?
(d) Explain what change you would expect in the signals if a larger dish was used.


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


Concave mirrors are used by dentists to examine teeth. Why?


Identify the device used as a spherical mirror or lens in following case, when the image formed is virtual and erect in case.

Object is placed between device and its focus, image formed is enlarged and behind it.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×