MCQ Questions for Class 7 Science: Ch 15 Light

MCQ Questions for Class 7 Science: Ch 15 Light

1. In a concave mirror the reflecting surface is
(a) Plane surface
(b) Bulging out surface
(c) Uneven surface
(d) Bent-in surface
► (d) Bent-in surface

2. When light bounces off a surface, the surface is
(a) Transparent
(b) Reflector
(c) Opaque
(d) Translucent
► (b) Reflector

3. Which of the following can form real images?
(a) A plane mirror            
(b) A convex mirror
(c) A convex lens   
(d) A concave lens
► (c) A convex lens   

4. Light is a form of
(a) Energy
(b) Power
(c) Heat
(d) Temperature
► (a) Energy

5. Light is
(a) an electromagnetic radiation
(b) a transverse wave
(c) mass less
(d) All of the above
► (d) All of the above

6. Concave lens always forms
(a) Magnified image
(b) Virtual image
(c) Inverted image
(d) Real image
► (b) Virtual image

7. We can see an object when it
(a) Refracts or absorbs the rays of light
(b) Reflects or emits rays of light
(c) Has bright colour
(d) Has shining surface
► (b) Reflects or emits rays of light

8. Bouncing back of light in same medium is called
(a) Retardation
(b) Reflection
(c) Refraction
(d) Rarefaction
► (b) Reflection

9. Band of seven colour of light appeared on screen when white light passes through is prism is called
(a) Spectrum
(b) Refractive index
(c) Angle of deviation
(d) Colour band
► (a) Spectrum

10. The type of lens, which is thicker in the middle and thinner at the edges and is used as magnifying glass, is called
(a) convex lens  
(b) concave lens
(c) diverging lens              
(d) None of these
► (a) convex lens  

11. Which of the following is used as side view mirror in vehicles?
(a) Plane mirror                
(b) Concave mirror
(c) Convex mirror   
(d) None of these
► (c) Convex mirror   

12. Which of the following would you prefer to use while reading small letters found in a dictionary?
(a) A concave mirror        
(b) A concave lens
(c) A convex mirror          
(d) A convex lens
► (d) A convex lens

13. Which colour of light scattered least
(a) Green
(b) Yellow
(c) Red
(d) Blue
► (c) Red

14. Normally a plane mirror forms
(a) a real image only
(b) a virtual image only
(c) Both real as well as virtual image
(d) Neither real nor virtual image
► (b) a virtual image only

15. ____________ refers to collection of rays.
(a) Shadow
(b) Photon
(c) Beam
(d) Image
► (c) Beam

16. White light breaks up into seven colours due to
(a) reflection        
(b) refraction
(c) dispersion     
(d) None of these
► (c) dispersion     

17. Concave lens is also known as
(a) Converging lens
(b) Diverging lens
(c) Bifocal length
(d) Biconcave lens
► (b) Diverging lens

18. A parallel beam of rays falling on a concave lens
(a) are scattered               
(b) remain parallel
(c) are diverged     
(d) are converged
► (c) are diverged     

19. We can see the objects only when
(a) reflected light reaches our eyes
(b) the objects absorb all the light
(c) the objects allow all the light to pass through them
(d) None of the above
► (a) reflected light reaches our eyes

20. In order to be used as mirrors, glasses are coated with
(a) silver    
(b) copper
(c) aluminium      
(d) platinum
► (a) silver    

21. If the angle between the incident ray and the normal to the plane of the mirror is 40∘, the angle between the incident ray and the reflected ray will be
(a) 40°                      
(b) 90°
(c) 80°         
(d) 60°
► (c) 80°         

22. White light consist of
(a) 3 colours
(b) 7 colours
(c) 9 colours
(d) 5 colours
► (b) 7 colours

23. Rectilinear propagation is
(a) mode of travelling in curved lines
(b) mode of travelling in straight lines
(c) ability to bend around obstacles
(d) displaying the phenomenon of diffraction
► (b) mode of travelling in straight lines

24. The lens present in human eye is made up of
(a) Glass
(b) Transparent protein
(c) White rubber
(d) Plastic
► (b) Transparent protein
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