Question 1 :
What type of mirror is used as a looking glass, as a reflector in solar cookers?

Question 3 :
What type of lens is used as a magnifying glass in micrscopes, telescopes etc?

Question 5 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cb82f59b460d7261ec4c.JPG' /> In the above figure, 6 is _____ in colour.

Question 6 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cb85f59b460d7261ec50.JPG' /> In the above figure, 3 is _______ in colour.

Question 7 :
An image which can be obtained on a screen is called a __________ image.

Question 8 :
An image formed by a concave __________ cannot be obtained on a screen.

Question 10 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cb7ef59b460d7261ec47.JPG' /> In the above figure, 1 is _____ in colour.

Question 11 :
If standing before a plane mirror you touch your nose with your left hand, right hand of your image will touch your nose. What is this phenomenon called?

Question 12 :
A man walks towards a plane mirror. At what rate will his image move if the mirror is stationary?

Question 13 :
Which of the following can be used to form a real image ?

Question 14 :
The inner surface of a steel spoon acts as a ___ mirror.

Question 15 :
Image which cannot be obtained on a screen is __________ .

Question 16 :
An image formed by a __________ mirror is always of the same size as that of the object.

Question 21 :
An image formed by a concave ___ cannot be obtained on a screen.

Question 22 :
An image formed by a ___ mirror is always of the same size as that of the object.

Question 23 :
<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 24 :
<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 26 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cbdcf59b460d7261ecb9.jpg' /> A person takes a torch covers its glass with a chart paper which has three narrow slits as shown in Figure above. He spreads a sheet of chart paper on a smooth wooden board and fixes a plane mirror strip vertically on the chart paper. Now, he directs the beam of light on the mirror from the torch with slits. He places the torch in such a way that its light is seen along the chart paper on the board. Now, he adjusts its position so that the light from the torch strikes the plane mirror at an angle. Does the mirror change the direction of light that falls on it?

Question 28 :
It was observed that when the distance between an object and a lens decreases, the size of the image increases. What is the nature of this lens ?

Question 29 :
A person stands in front of a plane mirror and looks at his image. Now, he touches his right ear. Which ear does his hand touch in the image?

Question 31 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cb88f59b460d7261ec53.JPG' /> In the above figure, 6 is ______ in colour.

Question 32 :
A virtual image larger than the object can be produced by a-

Question 33 :
Which mirror is used as a reflector in search light and headlights of the automobiles?

Question 34 :
An image that cannot be obtained on a screen is called ____________.

Question 35 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cb8df59b460d7261ec59.PNG ' /> In the above figure, What are the characteristics of the image formed ?

Question 36 :
If the reflecting surface is on the inner side, the mirror is called ____.

Question 37 :
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 38 :
Image that cannot be formed on a screen is known as _________.

Question 39 :
The outer surface of a flat steel plate acts as a ___ mirror.

Question 40 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cbddf59b460d7261ecba.jpg' /> A person takes a torch covers its glass with a chart paper which has three narrow slits as shown in Figure above. He spreads a sheet of chart paper on a smooth wooden board and fixes a plane mirror strip vertically on the chart paper. Now, he directs the beam of light on the mirror from the torch with slits. He places the torch in such a way that its light is seen along the chart paper on the board. Now, he adjusts its position so that the light from the torch strikes the plane mirror at an angle. Now, he moves the torch slightly to either side. Does he find any change in the direction of reflected light?

Question 42 :
What happens when light falls on a polished or a shiny surface?

Question 43 :
You are provided with a convex mirror, a concave mirror, a convex lens and a concave lens. You can get an inverted image from:

Question 44 :
The distance between the optical centre and the focus of a lens is called the ___ of the lens.

Question 45 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cb82f59b460d7261ec4b.JPG' /> In the above figure, 5 is _____ in colour

Question 47 :
A shopkeeper wanted to fix a mirror which will give a maximum view of his shop. What type of mirror should he use?

Question 50 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cb8af59b460d7261ec56.PNG ' /> In the above figure, What are the characteristics of the image formed?