IMAGE

If you were asked to think of electricity, many favourable and unfavourable images come to your mind. (i) Name the favourable images. (ii) What are the unfavourable images ? (iii) What is common to all these images ?

If you were asked to think of electricity, many favourable and unfavourable images come to your mind. (i) Name the favourable images. (ii) What are the unfavourable images ? (iii) What is common to all these images ?

If the lower half of a concave mirror's reflecting surface is made opaque, which of the following statements describe the image of an object placed in front of the mirror ? S1 : Intensity of the image will increase. S2 : The image will show only half of the object. S3 : No change in the image. S4 : Intensity if the image will be reduced to half.

Ultrasound imaging is

A convex lens forms an image of an object on a screen. The height of the image is 9 cm . The lens is now displaced until an image is again obtained on the screen. Then height of this image is 4 cm . The distance between the object and the screen is 90 cm.