# Light (Reflection and Refraction) - Worksheet

CBSE Class 10 - Physics

Directions: Give one-word answer to the following questions (Q1 - Q10).

Q1:  Which property of light changes when it travels from one medium to another?

Q2: Name the ray of light that falls on a mirror.

Q3: How is focal length, (f) of a mirror related to its radius of curvature (R)?

Q4: What kind of beam of light comes out of a car headlight?

Q5: Which mirror forms an image with the following characteristics.
(a) Virtual (b) Erect (c) Same size as the object (d) Laterally inverted

Q6: What is defined as ratio of size of image to size of the object?

Q7: In which type of spherical mirror, the image distane is always positive.

Q8: Which type of mirror is used to build shaving mirrors?

Q9: Where should an object be placed in front of convex lens to get a real image of the size of the object?

Q10: How many images are formed by two parallel mirrors?

Directions: Write True or False against each statement (Q11-Q15)

Q11: Light is an electromagnetic radiation.

Q12: Nonluminous objects become visible when they reflect the light falling on them.

Q13: The sign of magnification by a mirror gives information about the size of the image formed by it.

Q14: As per sign convention, the focal length of a convex lens is negative.

Q15: A spherical mirror, whose outer bulging surface is the reflecting surface is called a concave mirror.

Q16: A convex mirror has larger field view.

Q17: All distances are measured from the object position with respect to lens.

1: Speed or wavelength
2: Incident ray
3: f = R/2
4: Diverging beam or parallel beam
5: Plane mirror
6: Magnification
7: Convex mirror
8: Concave mirror
9: At twice the focal length
10: Infinite images.
11: True
12: True (e.g. Moon is visible due reflected light.)
13: False (If m is -ve, image is real. If m is +ve, image is virtual).
14: False (Focal length of convex lens is positive).
15: False
16: True
17: False (All distances are measured from the optical centre of the lens.)