Advertisements
Advertisements
Question
Name the type of mirror used in the following situation:
Solar furnace
Support your answer with reason.
Advertisements
Solution
Concave Mirror: This is because for solar furnaces, we use a concave mirror. Light from the sun, on reflection from the mirror, is concentrated at the focus of the mirror, producing heat.
APPEARS IN
RELATED QUESTIONS
A 4 cm tall object is placed on the principal axis of a convex lens. The distance of the object from the optical centre of the lens is 12 cm and its sharp image is formed at a distance of 24 cm from it on a screen on the other side of the lens. If the object is now moved a little away from the lens, in which way (towards the lens or away from the lens) will he have to move the screen to get a sharp image of the object on it again? How will the magnification of the image be affected?
We can obtain an enlarged and erect image by a convex mirror.
A ray of light travels from a denser medium to a rarer medium. How will it bend?
Draw separate diagram for the formation of virtual image of an object by a concave mirror.
State the number of images of an object placed between two mirrors, formed in each case when mirrors are inclined to each other at (a) 90°, and (b) 60°.
Define the terms pole, principal axis and centre of curvature with reference to a spherical mirror.
Name the spherical mirror which (i) diverges (ii) converges the beam of light incident on it. Justify your answer by drawing a ray diagram in each case.
Draw a ray diagram to show the formation of image by a concave mirror for the object beyond its centre of curvature. State three characteristics of the image.
What type of mirror can be used to obtain a real image of an object?
Which mirror will you prefer to use as a rear view mirror in a car : plane mirror or convex mirror? Give one reason.
Draw a ray diagram to show the formation of image of an object kept in front of a convex mirror. State three characteristics of the image.
For an incident ray directed towards centre of curvature of a spherical mirror the reflected ray:
An object forms a virtual image which is 1/8th of the size of the object. If the object is placed at a distance of 40 cm from the convex mirror, calculate:
- the position of the image
- the focal length of the convex mirror.
Define the following term in relation to concave mirror.
Principal focus
Define the following term in relation to concave mirror.
Focal length
Does the mirror name by your form a real image for all locations? Give a reason for your answer.
In torches, search lights and headlights of vehicles the bulb is placed ______.
What is the focal length (f) of a mirror?
Define the following terms in the context of a diverging mirror:
- Principal focus
- Focal length
Draw a labelled ray diagram to illustrate your answer.
