Test Details

Light

Reflection, Refraction,Human eye

Oct 23, 5:00 PM

40 minutes

Oct 23, 5:40 PM

60.0 marks

MCQ

28 questions

Shahid Hussain

Adaptive and blank

Class Details

Science& Maths

Class 10

Science& Maths

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Question Text

Question 2 :
Larger particles scatter light at the ____ end of the spectrum the least.

Question 4 :
Assertion: The setting sun appears to be red. Reason: Scattering of light is directly proportional to the wavelength.

Question 5 :
When the light rays converge at a point in front of the retina and then divert to form a blurred image on it, the defect is known as

Question 7 :
A ray passing with which part of a lens emerges undeviated ?

Question 8 :
If $$f$$ is focal length of the lens in $$cm$$, then the power of a lens is equal to:

Question 10 :
A thin film of thickness i and index of refraction 1.33 coats a glass with index of refraction 1.50. What is the least thickness/that will strongly reflect light with wavelength 600 nm incident normally?

Question 11 :
The focal length of a concave lens is $$2m$$. Then the power of the lens is:

Question 13 :
A concave mirror produces $$10$$ times enlarged image (real) of an object placed $$1 cm$$ in front of it. Where is the image located?

Question 14 :
A ray of light in a liquid of refractive index $$1.4$$ approaches the boundary surface between the liquid and air at an angle of incidence whose sine is $$0.8$$. Which of the following statement is correct about the behaviour of the light?

Question 15 :
A person cannot see objects clearly beyond $$2.0\ m$$. The power of lens required to correct his vision will be

Question 16 :
In the displacement method, a convex lens is placed in between an object and a screen. If one of the magnification is $$3$$ and the displacement of the lens between the two positions is $$24$$cm, then the focal length of the lens is:

Question 18 :
What would you use to obtain a real and inverted image for any position of an object ?

Question 19 :
If an object is placed at a distance of 20cm from the pole of a concave mirror, the magnification of its real image is 3. If the object is moved away from the mirror by 10cm, then the magnification is -1.

Question 20 :
The sun subtends an angle of $$(1/2)^o$$ at earth.The image of the sun is obtained on a screen using a converging lens of focal length 1.5 cm.The diameter of the image will be :

Question 21 :
A beam of monochromatic blue light of wavelength $$4200\mathring { A } $$ in air travels in water of refractive index $${ 4 }/{ 3 }$$. Its wavelength in water will be

Question 22 :
The distance between an object and a divergent lens is $$m$$ times the focal length of the lens. The linear magnification produced by the lens is

Question 23 :
The resolving power of an astronomical telescope is $$0.2$$ seconds. If the central half portion of the objective lens is covered, the resolving power will be:-

Question 24 :
Frosted glass is widely used for translucent windows. The region where a transparent adhesive tape is stuck over the frosted glass becomes transparent. The most reasonable explanation for this is :

Question 25 :
A ray of light travelling inside a rectangular glass block of refractive index $$\sqrt 2$$ is incident on the glass-air interface at an angle of incidence of $$45^o$$. The refractive index of air is one. Under the these conditions the ray will

Question 26 :
The magnitude of focal length of a concave mirror is $$f$$. An object is placed at a distance $$x$$ from the focus and forms a real image. The magnification is:

Question 27 :
A symmetric double convex lens is cut in two equal parts by a plane containing the principal axis. If the power of the original lens was 4 D, the power of a divided lens will be

Question 28 :
A $$2.5$$ dioptre lens forms a virtual image which is $$4$$ times the object placed perpendicularly on the lens. Then the required distance of the object from the lens is .

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