Question 1 :
Suppose you are in a dark room. Can you see objects in the room?
Question 3 :
Mention whether regular or diffused reflection will take place when a beam of light strikes on a Piece of paper?
Question 5 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d07bf59b460d7261f2fe.jpg' />
Light is falling on surface $S_1$, $S_2$, $S_3$ as shown in the above figure. Surfaces on which the angle of incidence is equal to the angle of reflection is/are
Question 6 :
Eyes of the nocturnal birds have large cornea and a large pupil.
How does this structure help them?
Question 7 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d078f59b460d7261f2fa.jpg' />
Boojho planned an activity to observe an object A through pipes as shown in the above figure, so that he could see objects which he could not directly see. How many mirrors should he use to see the objects?
Question 8 :
The angle between the normal and the reflected ray is known as the ___________ ?
Question 9 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d073f59b460d7261f2f3.jpg' />
Boojho planned an activity to observe an object A through pipes as shown in the above figure, so that he could see objects which he could not directly see. What must be the angle with respect to the incident light at which he should place the mirrors?
Question 10 :
The angle between the normal and incident ray is called the ___________ ?
Question 11 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d0dcf59b460d7261f379.JPG' />
From the above image, Can Boojho at C see this image?
Question 12 :
Fill in the blanks: The size of the pupil becomes__________ when you see in dim light.
Question 13 :
The retina contains several nerve cells. Sensations felt by the nerve cells are then transmitted to the brain through the optic nerve. Is it TRUE OR FALSE?
Question 15 :
Which part of the eye gets affected if someone is suffering from cataract?
Question 16 :
What is the most comfortable distance at which one can read with a normal eye?
Question 17 :
The incident ray, the normal at the point of incidence and the reflected ray all lie in the same plane. This law is known as ____________ ?
Question 18 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d07cf59b460d7261f2ff.jpg' />
In the above figure, a tiny mirror M is fixed on a piece of cardboard placed on a table. The cardboard is illuminated by light from a bulb. The position of eye with respect to position of bulb is shown in the figure as A, B, C and D. ln which position mirror will be visible?
Question 19 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d0fbf59b460d7261f3a1.PNG' />
Refer to the above figure. Can Paheli at B see the position of the image of an object situated at A in the plane mirror ?
Question 21 :
Mention whether regular or diffused reflection will take place when a beam of light strikes on White Chalk powder that is used in school?
Question 23 :
After striking the mirror, the ray of light is reflected in another direction. The light ray, which strikes any surface, is called ________ ?
Question 25 :
In the iris, there is a small opening called the __________?
Question 27 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d0dbf59b460d7261f377.JPG' />
From the above image,Find out the position of the image of an object situated at A in the plane mirror.
Question 29 :
After striking the mirror, the ray of light is reflected in another direction The ray that comes back from the surface after reflection is known as the ___________ ?
Question 30 :
Behind the cornea, we find a dark muscular structure called _____ ?
Question 31 :
Which of the following statements is correct regarding rods and
cones in the human eye?
Question 32 :
The objects which shine in the light of other objects are called illuminated objects. Is it TRUE OR FALSE?
Question 33 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d07cf59b460d7261f300.jpg' />
In the above figure, two mirrors A and B are placed at right angles to each other. A ray of light incident on mirror A at an angle of $25^\circ$ falls on mirror B after reflection. The angle of reflection for the ray reflected from mirror B would be
Question 34 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d07ef59b460d7261f302.jpg' />
In the above figure of the human eye, the cornea is represented by the letter
Question 35 :
Fill in the blanks: A person 1 m in front of a plane mirror seems to be _____ away from his image?
Question 36 :
The objects which emit their own light are known as _______ objects?
Question 38 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d07df59b460d7261f301.jpg' />
A small hole P is made in a piece of cardboard as shown in the above figure. The hole is illuminated by a torch. The pencil of light coming out of the hole falls on a mirror. At which point should the eye be placed so that the hole can be seen?
Question 39 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d0ddf59b460d7261f37a.JPG' />
From the above image, When Paheli moves from B to C, where does the image of A move?
Question 40 :
How many images of a candle will be formed if it is placed between two parallel plane mirrors separated by 40 cm?
Question 41 :
Fill in the blanks: If you touch your _______ ear with right hand in front of a plane mirror it will be seen in the mirror that your right ear is touched with the left hand.
Question 43 :
Mention whether regular or diffused reflection will take place when a beam of light strikes on Polished wooden table?
Question 44 :
How many times is a ray of light reflected by two plane mirrors placed parallel and facing each other?
Question 45 :
Choose the correct option, The angle of incidence is equal to the angle of reflection?
Question 48 :
When angle of incidence is equal to the angle of reflection
Question 49 :
The number of images formed by mirrors placed at an angle to one another to make numerous beautiful patterns is used in a _________ ?
Question 50 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d0faf59b460d7261f39f.PNG' />
Refer to the above figure. Can Boojho at C see the position of the image of an object situated at A in the plane mirror ?
