Hey buddy!!! As per your demand here I am providing you sample questions based on Ray Optics And Optical Instruments of IIT JEE

1.Mark the correct option.An object is placed 40 cm away from a concave mirror of focal length 20 cm. The image formed is:
real, inverted and same in size
real, inverted and smaller
virtual, erect and larger
virtual erect and smaller

2.A boy of length 10m, to see his own complete image, requires a mirror of length at east equal to:
10/4
10/3
10/2
10

3.Mark the correct option in impure spectrum.
Order of colours is reverse
Order of colours is irregular
Colours are overlapped
No colour is present

4.Mark the correct option of source which is associated with a line emission spectrum.
Electric fire
Neon street sign
Red traffic light
Sun

5.Light of different colours propagates through air:
with velocity of air
with different velocities
with velocity of sound
with equal velocity

6.If light travels from one medium to the other of which the refractive index is different, then which of the following will change?
Frequency, wavelength and velocity
Frequency and wavelength
Frequency and velocity
Wavelength and velocity

7.The number of wavelengths in the visible spectrum is:
4000
6000
2000
infinite

8.When a plane mirror is placed horizontally on level ground at a distance of 60 m from the foot of a tower, the top of the tower and its image in the mirror subtend an angle of 90 degree at the eye. The height of the tower is:
130 m
60 m
90 m
120 m

9.The size of the image, if an object of 2.5m height is placed at a distance of 10 cm from a concave mirror is: (Take radius of curvature of concave mirror = 30 cm)
10.5 m
9.2 m
7.5 m
5.6 m

10.When a ray of light falls on a prism, light gets dispersed because:
it is made of glass
it is triangular
refractive index of the prism material is different for different colours
light is of seven colours

11.If two mirrors are kept at 600 to each other, then the number of images formed by them is:
5
6
7
8

12.Select the correct alternative, in case of dispersion without deviation.
The emergent rays of all the colours are parallel to the incident ray
Only yellow coloured ray is parallel to the incident ray
Only red coloured ray is parallel to the incident ray
All the rays are parallel, but not parallel to the incident ray

13.Image formed by convex mirror is:
virtual
real
enlarged
inverted

14.The mirage in desert is caused because:
the refractive index of atmosphere does not change with height
there is effect of height on refractive index
light is reflected by the particles
none of the above

15.Which of the following is used in optical fibres?
Total internal reflection
Scattering
Diffraction
Refraction