Question

A student wants to project the image of a candle flame on a screen 80cm in front of a mirror by keeping flame at a distance of 15cm from its pole. Suggest the type of mirror he should use, determine the focal length , nature and size of image. Draw ray diagram

Answer 1

Some precautions must be taken while using a metre scale to measure the length of an object : -

1. Our eye should be vertically abvove the point, where the measurement is to be taken.

2. For proper measurement, Keep the ruler exactly along the length , for the measurement.

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Answer 2

hi friend

Explanation:

A student wants to project the image of a candle flame on a screen 80 cm in front of a mirror by keeping the candle flame at a distance of 20 cm from its pole.

Which type of mirror should the student use?

Find the magnification of the image produced.

Find the distance between the object and its image.

Draw a ray diagram to show the image formation in this case and mark the distance between the object and its image

Answer:

Concave mirror should be used.

Object distance, u = - 20 cm; image distance, v = - 80 cm;  

magnification, m = ?

image

Distance between the object and its image=v-u=60cm

image