Question 1 :
An image formed by a __________ mirror is always of the same size as that of the object.

Question 2 :
Image which cannot be obtained on a screen is __________ .

Question 3 :
We can obtain a real, enlarged and inverted image by a concave mirror.

Question 6 :
Rectilinear propagation of light means that beam of light always travels in ______ line.

Question 8 :
In automobiles, ________ mirror is used as a reflector in headlights of cars or scooters.

Question 9 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cb86f59b460d7261ec51.JPG' /> In the above figure, 4 is ____ in colour.

Question 13 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cb89f59b460d7261ec54.JPG' /> In the above figure, 7 is ______ in colour.

Question 14 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cbecf59b460d7261ecce.jpg' /> A person takes a convex lens and fixes it on a stand. He places it on a table. Also, he places a lighted candle at a distance of about 50 cm from the lens as shown in the figure. The image of the candle is obtained on a paper screen placed on the other side of the lens. He moves the screen towards or away from the lens to get a sharp image of the flame. What kind of image will he get?

Question 17 :
An image formed by a concave ___ cannot be obtained on a screen.

Question 18 :
Image formed by a convex __________ is always virtual and smaller in size.

Question 19 :
Which of the following can be used to form a real image ?

Question 23 :
David is observing his image in a plane mirror. The distance between the mirror and his image is 4 m. If he moves 1 m towards the mirror, then the distance between David and his image will be:

Question 25 :
A shopkeeper wanted to fix a mirror which will give a maximum view of his shop. What type of mirror should he use?

Question 26 :
If an object is placed at a distance of 0.5 m in front of a plane mirror, the distance between the object and the image formed by the mirror will be:

Question 28 :
An image formed by a lens is erect. Such an image could be formed by a :

Question 29 :
If you keep on decreasing the distance between the object and the lens, will you still be able to obtain the image on the screen ?