WorksheetsPhysics Form 4 Chapter 6 Light
Total questions: 21
Worksheet time: 14mins
Which of the following statements is true?
A convex lens has 4 dioptre power having a focal length 0.25 m
A convex lens has –4 dioptre power having a focal length 0.25 m
A concave lens has –4 dioptre power having a focal length 0.25 m
A concave lens has 4 dioptre power having a focal length 0.25 m
The image which is obtained on a screen
upright
impression
virtual image
real image
The inner surface of a steel spoon acts as a ………………….. mirror.
plane mirror
convex mirror
concave mirror
convex lens
A virtual image
(a) can be formed on the screen
(b) cannot be formed on the screen
(c) is formed only by a plane mirror
(d) is formed only by the convex mirror
a
b
c
d
A light ray enters from medium A to medium
B as shown in The refractive
index of medium B relative to A will be
greater than unity
less than unity
equal to unity
zero
The path of a ray of light coming from air
passing through a rectangular glass slab
traced by four students are shown as A,
B, C and D in Figure 10.5. Which one of
them is correct?
An eye views an object O by reflection in a plane mirror. Which is the correct ray diagram?
A
B
C
D
longer wavelength: blue
longer wavelength: red
longer wavelength: blue
longer wavelength: red
An erect and enlarged image can be formed by
(a) only a convex mirror
(b) only a concave mirror
(c) only a plane mirror
(d) Both convex and concave mirrors
What is the focal length of the lens?
Several different values of i and r are measured, and a graph is drawn of sin i against sin r.
Which graph is correct?
A 10 mm long awl pin is placed vertically in front of a concave mirror. A 5 mm long image of the awl pin is formed at 30 cm in front of the mirror. The focal length of this mirror is
30cm
20cm
60cm
40cm
To two decimal places, what is the refractive index of the plastic?
A ray of light is travelling in a direction perpendicular to the boundary of a parallel glass slab. The ray of light:
Is refracted towards the normal
Is refracted away from the normal
Is reflected along the same path
Does not get refracted
Which of the following would you prefer to use while reading small letters found in a dictionary?
(a) A convex lens
(b) A convex mirror
(c) A concave lens
(d) Either (a) or (b)
A
B
C
D
An object is placed 20 cm in front of a plane mirror. The mirror is moved 2 cm towards the object. The distance between the positions of the original and final images seen in the mirror is:
2 cm
4 cm
10 cm
22 cm
