1. A student used a device (X) to obtain/focus the image of a well illuminated distant building on a screen (S) as shown alongside in the diagram. Select the correct statement about the device (X).

2. A student obtains a sharp image of the distant window (W) of the school laboratory on the screen (S) using the given concave mirror (M) to determine its focal length. Which of the following distances should he measure to get the focal length of the mirror?

3. The mirror having reflection surface curved outward

4. The mirror having reflecting surface curved inwards

5. The mirror used as rear-view mirror in vehicles

6. The deviation of light ray from its path when it travels from one transparent medium to another transparent medium is called

7. Convex lens is also known as

8. The image which is formed behind the mirror