Ray Optics Test

Result

Ray Optics Test - 90

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
4 / -1

If the focal length of the objective lens is increased then

A
Magnifying power of microscope will increase but that of telescope will decrease

B
Magnifying power of microscope and telescope both will increase

C
Magnifying power of microscope and telescope both will decrease

D
Magnifying power of microscope will decrease but that of telescope will increase
Question 2
4 / -1

At Kavalur in India, the astronomers using a telescope whose objective had a diameter of one metre started using a telescope of diameter 2.54 m. This resulted in

A
The increase in the resolving power by 2.54 times for the same λ

B
The increase in the limiting angle by 2.54 times for the same λ

C
Decrease in resolving power

D
No effect on the limiting angle

Solution
Question 3
4 / -1

The focal lengths of the objective and the eye-piece of a compound microscope are 2.0 cm and 3.0 cm respectively. The distance between the objective and the eye-piece is 15.0 cm. The final image formed by theeye-piece is at infinity. The two lenses are thin. The distances in cm of the object and the image produced by the objective measured from the objective lens are respectively

A
2.4 and 12.0

B
2.4 and 15.0

C
2.3 and 12.0

D
2.3 and 3.0

Solution
Question 4
4 / -1

Resolving power of a microscope depends upon

A
The focal length and aperture of the eye lens

B
The focal lengths of the objective and the eye lens

C
The apertures of the objective and the eye lens

D
The wavelength of light illuminating the object

Solution
Question 5
4 / -1

The objective lens of a compound microscope produces magnification of 10. In order to get an overall magnification of 100 when image is formed at 25 cm from the eye, the focal length of the eye lens should be

A
4 cm

B
10 cm

C

D
9 cm

Solution
Question 6
4 / -1

A person using a lens as a simple microscope sees an

A
Inverted virtual image

B
Inverted real magnified image

C
Upright virtual image

D
Upright real magnified image
Question 7
4 / -1

Least distance of distinct vision is 25 cm. Magnifying power of simple microscope of focal length 5 cm is

A
1/5

B
5

C
1/6

D
6

Solution
Question 8
4 / -1

Resolving power of a microscope depends upon

A
Wavelength of light used, directly

B
Wavelength of light used, inversely

C
Frequency of light used

D
Focal length of objective

Solution
Question 9
4 / -1

In a compound microscope cross-wires are fixed at thepoint

A
Where the image is formed by the objective

B
Where the image is formed by the eye-piece

C
Where the focal point of the objective lies

D
Where the focal point of the eye-piece lies
Question 10
4 / -1

In a compound microscope, the intermediate image is

A
Virtual, erect and magnified

B
Real, erect and magnified

C
Real, inverted and magnified

D
Virtual, erect and reduced